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Code Editor : functions-redshift.ini

[ABS]
declaration=number
category=Math Functions
description=ABS calculates the absolute value of a number, where that number can be a literal or an expression that evaluates to a number.
[ACOS]
declaration=number
category=Math Functions
description=ACOS is a trigonometric function that returns the arc cosine of a number. The return value is in radians and is between PI/2 and -PI/2.
[ADD_MONTHS]
declaration=date,timestamp,integer
category=Date and Time Functions
description=ADD_MONTHS adds the specified number of months to a date or time stamp value or expression. The DATEADD function provides similar functionality.
[APPROXIMATE]
declaration=percentile,expr
category=Aggregate Functions
description=APPROXIMATE PERCENTILE_DISC is an inverse distribution function that assumes a discrete distribution model. It takes a percentile value and a sort specification and returns an element from the given set. Approximation enables the function to execute much faster, with a low relative error of around 0.5 percent.
[ASIN]
declaration=number
category=Math Functions
description=ASIN is a trigonometric function that returns the arc sine of a number. The return value is in radians and is between PI/2 and -PI/2.
[ATAN2]
declaration=number1,number2
category=Math Functions
description=ATAN2 is a trigonometric function that returns the arc tangent of a one number divided by another number. The return value is in radians and is between PI/2 and -PI/2.
[ATAN]
declaration=number
category=Math Functions
description=ATAN is a trigonometric function that returns the arc tangent of a number. The return value is in radians and is between PI/2 and -PI/2.
[AVG]
declaration=expression
category=Aggregate Functions
description=The AVG function returns the average (arithmetic mean) of the input expression values. The AVG function works with numeric values and ignores NULL values.
[BIT_AND]
declaration=expression
category=Bit-Wise Aggregate Functions
description=
[BIT_OR]
declaration=expression
category=Bit-Wise Aggregate Functions
description=
[BOOL_AND]
declaration=expression
category=Bit-Wise Aggregate Functions
description=
[BOOL_OR]
declaration=expression
category=Bit-Wise Aggregate Functions
description=
[BTRIM]
declaration=string,matching_string
category=String Functions
description=The BTRIM function trims a string by removing leading and trailing blanks or by removing characters that match an optional specified string.
[BTTEXT_PATTERN_CMP]
declaration=
category=String Functions
description=Synonym for the BPCHARCMP function.
[CASE]
declaration=expression,value,result,Boolean condition
category=Conditional Expressions
description=The CASE expression is a conditional expression, similar to if/then/else statements found in other languages. CASE is used to specify a result when there are multiple conditions.
[CAST]
declaration=expression,type
category=Data Type Formatting Functions
description=You can do run-time conversions between compatible data types by using the CAST and CONVERT functions.
[CBRT]
declaration=
category=Math Functions
description=The CBRT function is a mathematical function that calculates the cube root of a number.
[CEILING]
declaration=number
category=Math Functions
description=The CEILING or CEIL function is used to round a number up to the next whole number. (The FLOOR Function rounds a number down to the next whole number.)
[CEIL]
declaration=number
category=Math Functions
description=The CEILING or CEIL function is used to round a number up to the next whole number. (The FLOOR Function rounds a number down to the next whole number.)
[CHARACTER_LENGTH]
declaration=
category=String Functions
description=Synonym of the LEN function.
[CHARINDEX]
declaration=substring,string
category=String Functions
description=Returns the location of the specified substring within a string. Synonym of the STRPOS function.
[CHAR_LENGTH]
declaration=
category=String Functions
description=Synonym of the LEN function.
[CHECKSUM]
declaration=expression
category=Math Functions
description=Computes a checksum value for building a hash index.
[CHR]
declaration=number
category=String Functions
description=The CHR function returns the character that matches the ASCII code point value specified by of the input parameter.
[COALESCE]
declaration=
category=Conditional Expressions
description=Synonym of the NVL expression.
[CONCAT]
declaration=string1,string2
category=String Functions
description=The CONCAT function concatenates two character strings and returns the resulting string. To concatenate more than two strings, use nested CONCAT functions. The concatenation operator (||) between two strings produces the same results as the CONCAT function.
[CONVERT]
declaration=expression,type
category=Data Type Formatting Functions
description=You can do run-time conversions between compatible data types by using the CAST and CONVERT functions.
[CONVERT_TIMEZONE]
declaration=source_timezone,target_timezone,timestamp
category=Date and Time Functions
description=CONVERT_TIMEZONE converts a time stamp from one time zone to another.
[COS]
declaration=number
category=Math Functions
description=COS is a trigonometric function that returns the cosine of a number. The return value is in radians and is between PI/2 and -PI/2.
[COT]
declaration=number
category=Math Functions
description=COT is a trigonometric function that returns the cotangent of a number. The input parameter must be nonzero.
[COUNT]
declaration=expression
category=Aggregate Functions
description=The COUNT function counts the rows defined by the expression.
[CRC32]
declaration=string
category=String Functions
description=CRC32 is an error-detecting function that uses a CRC32 algorithm to detect changes between source and target data. The CRC32 function converts a variable-length string into an 8-character string that is a text representation of the hexadecimal value of a 32 bit-binary sequence.
[CUME_DIST]
declaration=partition_expression,order_list
category=Window Functions
description=Calculates the cumulative distribution of a value within a window or partition. Assuming ascending ordering, the cumulative distribution is determined using this formula:
[CURRENT_DATABASE]
declaration=
category=System Information Functions
description=Returns the name of the database where you are currently connected.
[CURRENT_DATE]
declaration=
category=Date and Time Functions
description=CURRENT_DATE returns a date in the current session time zone (UTC by default) in the default format: YYYY-MM-DD.
[CURRENT_SCHEMAS]
declaration=include_implicit
category=System Information Functions
description=Returns an array of the names of any schemas in the current search path. The current search path is defined in the search_path parameter.
[CURRENT_SCHEMA]
declaration=
category=System Information Functions
description=Returns the name of the schema at the front of the search path. This schema will be used for any tables or other named objects that are created without specifying a target schema.
[CURRENT_SETTING]
declaration=parameter
category=System Administration Functions
description=CURRENT_SETTING returns the current value of the specified configuration parameter.
[CURRENT_USER]
declaration=
category=System Information Functions
description=Returns the user name of the current "effective" user of the database, as applicable to checking permissions. Usually, this user name will be the same as the session user; however, this can occasionally be changed by superusers.
[CURRENT_USER_ID]
declaration=
category=System Information Functions
description=Returns the unique identifier for the Amazon Redshift user logged in to the current session.
[DATEADD]
declaration=datepart,interval,date,timestamp
category=Date and Time Functions
description=Increments a date or time stamp value by a specified interval.
[DATEDIFF]
declaration=datepart,datepart boundaries,date,timestamp
category=Date and Time Functions
description=DATEDIFF returns the difference between the date parts of two date or time expressions.
[DATE_CMP]
declaration=date1,date2
category=Date and Time Functions
description=DATE_CMP compares two dates. The function returns 0 if the dates are identical, 1 if date1 is greater, and -1 if date2 is greater.
[DATE_CMP_TIMESTAMPTZ]
declaration=date,timestamptz
category=Date and Time Functions
description=DATE_CMP_TIMESTAMPTZ compares a date to a time stamp with time zone. If the date and time stamp values are identical, the function returns 0. If the date is greater alphabetically, the function returns 1. If the time stamp is greater, the function returns –1.
[DATE_CMP_TIMESTAMP]
declaration=date,timestamp
category=Date and Time Functions
description=Compares a date to a time stamp and returns 0 if the values are identical, 1 if date is greater alphabetically and -1 if timestamp is greater.
[DATE_PART]
declaration=datepart,date,timestamp
category=Date and Time Functions
description=DATE_PART extracts datepart values from an expression. DATE_PART is a synonym of the PGDATE_PART function.
[DATE_PART_YEAR]
declaration=date
category=Date and Time Functions
description=The DATE_PART_YEAR function extracts the year from a date.
[DATE_TRUNC]
declaration=datepart,timestamp
category=Date and Time Functions
description=The DATE_TRUNC function truncates a time stamp expression or literal based on the date part that you specify, such as hour, week, or month. DATE_TRUNC returns the first day of the specified year, the first day of the specified month, or the Monday of the specified week.
[DECODE]
declaration=expression,search,result,default
category=Conditional Expressions
description=A DECODE expression replaces a specific value with either another specific value or a default value, depending on the result of an equality condition. This operation is equivalent to the operation of a simple CASE expression or an IF-THEN-ELSE statement.
[DEGREES]
declaration=number
category=Math Functions
description=Converts an angle in radians to its equivalent in degrees.
[DENSE_RANK]
declaration=expr_list,order_list
category=Window Functions
description=The DENSE_RANK window function determines the rank of a value in a group of values, based on the ORDER BY expression in the OVER clause. If the optional PARTITION BY clause is present, the rankings are reset for each group of rows. Rows with equal values for the ranking criteria receive the same rank. The DENSE_RANK function differs from RANK in one respect: If two or more rows tie, there is no gap in the sequence of ranked values. For example, if two rows are ranked 1, the next rank is 2.
[DEXP]
declaration=number
category=Math Functions
description=The DEXP function returns the exponential value in scientific notation for a double precision number. The only difference between the DEXP and EXP functions is that the parameter for DEXP must be a double precision.
[DLOG10]
declaration=number
category=Math Functions
description=The DLOG10 returns the base 10 logarithm of the input parameter. Synonym of the LOG function.
[DLOG1]
declaration=
category=Math Functions
description=The DLOG1 function returns the natural logarithm of the input parameter. Synonym for the LN function.
[EXP]
declaration=expression
category=Math Functions
description=The EXP function returns the exponential value in scientific notation for a numeric expression.
[EXTRACT]
declaration=datepart,literal,timestamp
category=Date and Time Functions
description=The EXTRACT function returns a date part, such as a day, month, or year, from a time stamp value or expression.
[FIRST_VALUE]
declaration=expression,expr_list,order_list,frame_clause
category=Window Functions
description=Given an ordered set of rows, FIRST_VALUE returns the value of the specified expression with respect to the first row in the window frame. The LAST_VALUE function returns the value of the expression with respect to the last row in the frame.
[FLOOR]
declaration=number
category=Math Functions
description=The FLOOR function rounds a number down to the next whole number.
[FUNC_SHA1]
declaration=string
category=String Functions
description=The FUNC_SHA1 function uses the SHA1 cryptographic hash function to convert a variable-length string into a 40-character string that is a text representation of the hexadecimal value of a 160-bit checksum.
[GETDATE]
declaration=
category=Date and Time Functions
description=GETDATE returns the current date and time in the current session time zone (UTC by default).
[GREATEST]
declaration=expression_list
category=Conditional Expressions
description=Returns the largest value from a list of any number of expressions.
[HAS_DATABASE_PRIVILEGE]
declaration=user,database,privilege
category=System Information Functions
description=Returns true if the user has the specified privilege for the specified database. For more information about privileges, see GRANT.
[HAS_SCHEMA_PRIVILEGE]
declaration=user,schema,privilege
category=System Information Functions
description=Returns true if the user has the specified privilege for the specified schema. For more information about privileges, see GRANT.
[HAS_TABLE_PRIVILEGE]
declaration=user,table,privilege
category=System Information Functions
description=Returns true if the user has the specified privilege for the specified table.
[INITCAP]
declaration=string
category=String Functions
description=Capitalizes the first letter of each word in a specified string. INITCAP supports UTF-8 multibyte characters, up to a maximum of four bytes per character.
[INTERVAL_CMP]
declaration=interval1,interval2
category=Date and Time Functions
description=INTERVAL_CMP compares two intervals and returns 1 if the first interval is greater, -1 if the second interval is greater, and 0 if the intervals are equal. For more information, see Interval Literals.
[IS_VALID_JSON]
declaration=json_string
category=JSON Functions
description=IS_VALID_JSON validates a JSON string. The function returns Boolean true (t) if the string is properly formed JSON or false (f) if the string is malformed. To validate a JSON array, use IS_VALID_JSON_ARRAY Function
[IS_VALID_JSON_ARRAY]
declaration=json_array
category=JSON Functions
description=IS_VALID_JSON_ARRAY validates a JSON array. The function returns Boolean true (t) if the array is properly formed JSON or false (f) if the array is malformed. To validate a JSON string, use IS_VALID_JSON Function
[JSON_ARRAY_LENGTH]
declaration=json_array,null_if_invalid
category=JSON Functions
description=JSON_ARRAY_LENGTH returns the number of elements in the outer array of a JSON string. If the null_if_invalid argument is set to true and the JSON string is invalid, the function returns NULL instead of returning an error.
[JSON_EXTRACT_ARRAY_ELEMENT_TEXT]
declaration=json_string,pos,null_if_invalid
category=JSON Functions
description=JSON_EXTRACT_ARRAY_ELEMENT_TEXT returns a JSON array element in the outermost array of a JSON string, using a zero-based index. The first element in an array is at position 0. If the index is negative or out of bound, JSON_EXTRACT_ARRAY_ELEMENT_TEXT returns empty string. If the null_if_invalid argument is set to true and the JSON string is invalid, the function returns NULL instead of returning an error.
[JSON_EXTRACT_PATH_TEXT]
declaration=json_string,path_elem,null_if_invalid
category=JSON Functions
description=JSON_EXTRACT_PATH_TEXT returns the value for the key:value pair referenced by a series of path elements in a JSON string. The JSON path can be nested up to five levels deep. Path elements are case-sensitive. If a path element does not exist in the JSON string, JSON_EXTRACT_PATH_TEXT returns an empty string. If the null_if_invalid argument is set to true and the JSON string is invalid, the function returns NULL instead of returning an error.
[LAG]
declaration=value_expr,offset,window_partition,window_ordering
category=Window Functions
description=The LAG window function returns the values for a row at a given offset above (before) the current row in the partition.
[LAST_DAY]
declaration=
category=Date and Time Functions
description=LAST_DAY returns the date of the last day of the month that contains date. The return type is always DATE, regardless of the data type of the date argument.
[LAST_VALUE]
declaration=expression,expr_list,order_list,frame_clause
category=Window Functions
description=Given an ordered set of rows, FIRST_VALUE returns the value of the specified expression with respect to the first row in the window frame. The LAST_VALUE function returns the value of the expression with respect to the last row in the frame.
[LEAD]
declaration=value_expr,offset,window_partition,window_ordering
category=Window Functions
description=The LEAD window function returns the values for a row at a given offset below (after) the current row in the partition.
[LEAST]
declaration=expression_list
category=Conditional Expressions
description=Returns the smallest value from a list of any number of expressions.
[LEFT]
declaration=string,integer
category=String Functions
description=These functions return the specified number of leftmost or rightmost characters from a character string.
[LENGTH]
declaration=
category=String Functions
description=Synonym of the LEN function.
[LEN]
declaration=expression
category=String Functions
description=Returns the length of the specified string as the number of characters.
[LISTAGG]
declaration=aggregate_expression,delimiter,WITHIN GROUP (ORDER BY order_list)
category=Aggregate Functions
description=For each group in a query, the LISTAGG aggregate function orders the rows for that group according to the ORDER BY expression, then concatenates the values into a single string.
[LN]
declaration=expression
category=Math Functions
description=Returns the natural logarithm of the input parameter. Synonym of the DLOG1 function.
[LOG]
declaration=number
category=Math Functions
description=Returns the base 10 logarithm of a number.
[LOWER]
declaration=string
category=String Functions
description=Converts a string to lowercase. LOWER supports UTF-8 multibyte characters, up to a maximum of four bytes per character.
[LPAD]
declaration=string1,length,string2
category=String Functions
description=These functions prepend or append characters to a string, based on a specified length.
[LTRIM]
declaration=string,trim_chars
category=String Functions
description=The LTRIM function trims a specified set of characters from the beginning of a string.
[MAX]
declaration=expression
category=Aggregate Functions
description=The MAX function returns the maximum value in a set of rows. DISTINCT or ALL may be used but do not affect the result.
[MD5]
declaration=string
category=String Functions
description=Uses the MD5 cryptographic hash function to convert a variable-length string into a 32-character string that is a text representation of the hexadecimal value of a 128-bit checksum.
[MEDIAN]
declaration=median_expression
category=Aggregate Functions
description=Calculates the median value for the range of values. NULL values in the range are ignored.
[MIN]
declaration=expression
category=Aggregate Functions
description=The MIN function returns the minimum value in a set of rows. DISTINCT or ALL may be used but do not affect the result.
[MOD]
declaration=number1,number2
category=Math Functions
description=The MOD function returns a numeric result that is the remainder of two numeric parameters. The first parameter is divided by the second parameter.
[MONTHS_BETWEEN]
declaration=date1,date2
category=Date and Time Functions
description=MONTHS_BETWEEN determines the number of months between two dates.
[NEXT_DAY]
declaration=date,timestamp,day
category=Date and Time Functions
description=NEXT_DAY returns the date of the first instance of the specified day that is later than the given date.
[NTH_VALUE]
declaration=expr,offset,window_partition,window_ordering,frame_clause
category=Window Functions
description=The NTH_VALUE window function returns the expression value of the specified row of the window frame relative to the first row of the window.
[NTILE]
declaration=expr,window_partition,window_ordering
category=Window Functions
description=The NTILE window function divides ordered rows in the partition into the specified number of ranked groups of as equal size as possible and returns the group that a given row falls into.
[NULLIF]
declaration=expression1, expression2
category=Conditional Expressions
description=The NULLIF expression compares two arguments and returns null if the arguments are equal.
[NVL2]
declaration=expression,not_null_return_value,null_return_value
category=Conditional Expressions
description=Returns one of two values based on whether a specified expression evaluates to NULL or NOT NULL.
[NVL]
declaration=
category=Conditional Expressions
description=An NVL expression is identical to a COALESCE expression. NVL and COALESCE are synonyms.
[OCTET_LENGTH]
declaration=expression
category=String Functions
description=Returns the length of the specified string as the number of bytes.
[PERCENTILE_CONT]
declaration=percentile,expr
category=Aggregate Functions
description=PERCENTILE_CONT is an inverse distribution function that assumes a continuous distribution model. It takes a percentile value and a sort specification, and returns an interpolated value that would fall into the given percentile value with respect to the sort specification.
[PERCENTILE_DISC]
declaration=percentile,expr
category=Aggregate Functions
description=APPROXIMATE PERCENTILE_DISC is an inverse distribution function that assumes a discrete distribution model. It takes a percentile value and a sort specification and returns an element from the given set. Approximation enables the function to execute much faster, with a low relative error of around 0.5 percent.
[PERCENT_RANK]
declaration=partition_expression,order_list
category=Window Functions
description=Calculates the percent rank of a given row. The percent rank is determined using this formula:
[PG_BACKEND_PID]
declaration=
category=System Information Functions
description=Returns the process ID (PID) of the server process handling the current session.
[PG_CANCEL_BACKEND]
declaration=pid
category=System Administration Functions
description=Cancels a query. PG_CANCEL_BACKEND is functionally equivalent to the CANCEL command. You can cancel queries currently being run by your user. Superusers can cancel any query.
[PG_GET_COLS]
declaration=name
category=System Information Functions
description=Returns the column metadata for a table or view definition.
[PG_GET_LATE_BINDING_VIEW_COLS]
declaration=
category=System Information Functions
description=Returns the column metadata for all late-binding views in the database. For more information, see Late-Binding Views
[PG_LAST_COPY_COUNT]
declaration=
category=System Information Functions
description=Returns the number of rows that were loaded by the last COPY command executed in the current session. PG_LAST_COPY_COUNT is updated with the last COPY ID, which is the query ID of the last COPY that began the load process, even if the load failed. The query ID and COPY ID are updated when the COPY command begins the load process.
[PG_LAST_COPY_ID]
declaration=
category=System Information Functions
description=Returns the query ID of the most recently executed COPY command in the current session. If no COPY commands have been executed in the current session, PG_LAST_COPY_ID returns -1.
[PG_LAST_QUERY_ID]
declaration=
category=System Information Functions
description=Returns the query ID of the most recently executed query in the current session. If no queries have been executed in the current session, PG_LAST_QUERY_ID returns -1. PG_LAST_QUERY_ID does not return the query ID for queries that execute exclusively on the leader node. For more information, see Leader Node–Only Functions.
[PG_LAST_UNLOAD_COUNT]
declaration=
category=System Information Functions
description=Returns the number of rows that were unloaded by the last UNLOAD command executed in the current session. PG_LAST_UNLOAD_COUNT is updated with the query ID of the last UNLOAD, even if the operation failed. The query ID is updated when the UNLOAD is executed. If the UNLOAD fails because of a syntax error or because of insufficient privileges, PG_LAST_UNLOAD_COUNT returns the count for the previous UNLOAD. If no UNLOAD commands were executed in the current session, or if the last UNLOAD failed during the unload operation, PG_LAST_UNLOAD_COUNT returns 0.
[PG_LAST_UNLOAD_ID]
declaration=
category=System Information Functions
description=Returns the query ID of the most recently executed UNLOAD command in the current session. If no UNLOAD commands have been executed in the current session, PG_LAST_UNLOAD_ID returns -1.
[PG_TERMINATE_BACKEND]
declaration=pid
category=System Administration Functions
description=Terminates a session. You can terminate a session owned by your user. A superuser can terminate any session.
[PI]
declaration=
category=Math Functions
description=The PI function returns the value of PI to 14 decimal places.
[POSITION]
declaration=substring,string
category=String Functions
description=Returns the location of the specified substring within a string.
[POWER]
declaration=expression1,expression2
category=Math Functions
description=The POWER function is an exponential function that raises a numeric expression to the power of a second numeric expression.
[QUOTE_IDENT]
declaration=string
category=String Functions
description=The QUOTE_IDENT function returns the specified string as a double quoted string so that it can be used as an identifier in a SQL statement. Appropriately doubles any embedded double quotes.
[QUOTE_LITERAL]
declaration=string
category=String Functions
description=The QUOTE_LITERAL function returns the specified string as a quoted string so that it can be used as a string literal in a SQL statement. If the input parameter is a number, QUOTE_LITERAL treats it as a string. Appropriately doubles any embedded single quotes and backslashes.
[RADIANS]
declaration=string
category=Math Functions
description=Converts an angle in degrees to its equivalent in radians.
[RANDOM]
declaration=
category=Math Functions
description=The RANDOM function generates a random value between 0.0 and 1.0.
[RANK]
declaration=expr_list,order_list
category=Window Functions
description=The RANK window function determines the rank of a value in a group of values, based on the ORDER BY expression in the OVER clause. If the optional PARTITION BY clause is present, the rankings are reset for each group of rows. Rows with equal values for the ranking criteria receive the same rank. Amazon Redshift adds the number of tied rows to the tied rank to calculate the next rank and thus the ranks might not be consecutive numbers. For example, if two rows are ranked 1, the next rank is 3.
[RATIO_TO_REPORT]
declaration=ratio_expression,partition_expression
category=Window Functions
description=Calculates the ratio of a value to the sum of the values in a window or partition. The ratio to report value is determined using the formula:
[REGEXP_COUNT]
declaration=source_string,pattern,position
category=String Functions
description=Searches a string for a regular expression pattern and returns an integer that indicates the number of times the pattern occurs in the string. If no match is found, then the function returns 0. For more information about regular expressions, see POSIX Operators.
[REGEXP_INSTR]
declaration=source_string,pattern,position,occurrence,option,parameters
category=String Functions
description=Searches a string for a regular expression pattern and returns an integer that indicates the beginning position or ending position of the matched substring. If no match is found, then the function returns 0. REGEXP_INSTR is similar to the POSITION function, but lets you search a string for a regular expression pattern. For more information about regular expressions, see POSIX Operators.
[REGEXP_REPLACE]
declaration=source_string,pattern,replace_string,position
category=String Functions
description=Searches a string for a regular expression pattern and replaces every occurrence of the pattern with the specified string. REGEXP_REPLACE is similar to the REPLACE Function, but lets you search a string for a regular expression pattern. For more information about regular expressions, see POSIX Operators.
[REGEXP_SUBSTR]
declaration=source_string,pattern,position,occurrence,parameters
category=String Functions
description=Returns the characters extracted from a string by searching for a regular expression pattern. REGEXP_SUBSTR is similar to the SUBSTRING Function function, but lets you search a string for a regular expression pattern. For more information about regular expressions, see POSIX Operators.
[REPEAT]
declaration=string,integer
category=String Functions
description=Repeats a string the specified number of times. If the input parameter is numeric, REPEAT treats it as a string.
[REPLACE]
declaration=string,old_chars,new_chars,old_string
category=String Functions
description=Replaces all occurrences of a set of characters within an existing string with other specified characters.
[REPLICATE]
declaration=
category=String Functions
description=Synonym for the REPEAT function.
[REVERSE]
declaration=expression
category=String Functions
description=The REVERSE function operates on a string and returns the characters in reverse order. For example, reverse('abcde') returns edcba. This function works on numeric and date data types as well as character data types; however, in most cases it has practical value for character strings.
[RIGHT]
declaration=string,integer
category=String Functions
description=These functions return the specified number of leftmost or rightmost characters from a character string.
[ROUND]
declaration=number
category=Math Functions
description=The ROUND function rounds numbers to the nearest integer or decimal.
[ROW_NUMBER]
declaration=expr_list,order_list
category=Window Functions
description=Determines the ordinal number of the current row within a group of rows, counting from 1, based on the ORDER BY expression in the OVER clause. If the optional PARTITION BY clause is present, the ordinal numbers are reset for each group of rows. Rows with equal values for the ORDER BY expressions receive the different row numbers nondeterministically.
[RPAD]
declaration=string1,length,string2
category=String Functions
description=These functions prepend or append characters to a string, based on a specified length.
[RTRIM]
declaration=string,trim_chars
category=String Functions
description=The RTRIM function trims a specified set of characters from the end of a string.
[SESSION_USER]
declaration=
category=System Information Functions
description=Returns the name of the user associated with the current session. This is the user who initiated the current database connection.
[SET_CONFIG]
declaration=parameter,new_value,is_local
category=System Administration Functions
description=Sets a configuration parameter to a new setting.
[SIGN]
declaration=numeric
category=Math Functions
description=The SIGN function returns the sign (positive or negative) of a numeric value. The result of the SIGN function will be a 1, -1, or 0 indicating the sign of the argument.
[SIN]
declaration=number
category=Math Functions
description=SIN is a trigonometric function that returns the sine of a number. The return value is in radians and is between PI/2 and -PI/2.
[SLICE_NUM]
declaration=
category=System Information Functions
description=Returns an integer corresponding to the slice number in the cluster where the data for a row is located. SLICE_NUM takes no parameters.
[SPLIT_PART]
declaration=string,delimiter,part
category=String Functions
description=Splits a string on the specified delimiter and returns the part at the specified position.
[SQRT]
declaration=expression
category=Math Functions
description=The SQRT function returns the square root of a numeric value.
[STDDEV_POP]
declaration=
category=Aggregate Functions
description=The STDDEV_SAMP and STDDEV_POP functions return the sample and population standard deviation of a set of numeric values (integer, decimal, or floating-point). The result of the STDDEV_SAMP function is equivalent to the square root of the sample variance of the same set of values.
[STDDEV_SAMP]
declaration=
category=Aggregate Functions
description=The STDDEV_SAMP and STDDEV_POP functions return the sample and population standard deviation of a set of numeric values (integer, decimal, or floating-point). The result of the STDDEV_SAMP function is equivalent to the square root of the sample variance of the same set of values.
[STRPOS]
declaration=string,substring
category=String Functions
description=Returns the position of a substring within a specified string.
[STRTOL]
declaration=num_string,base
category=String Functions
description=Converts a string expression of a number of the specified base to the equivalent integer value. The converted value must be within the signed 64-bit range.
[SUBSTRING]
declaration=string,start_position,number_characters
category=String Functions
description=Returns the characters extracted from a string based on the specified character position for a specified number of characters.
[SUM]
declaration=expression
category=Aggregate Functions
description=The SUM function returns the sum of the input column or expression values. The SUM function works with numeric values and ignores NULL values.
[SYSDATE]
declaration=
category=Date and Time Functions
description=SYSDATE returns the current date and time in the current session time zone (UTC by default).
[TAN]
declaration=number
category=Math Functions
description=TAN is a trigonometric function that returns the tangent of a number. The input parameter must be a non-zero number (in radians).
[TEXTLEN]
declaration=
category=String Functions
description=Synonym of LEN function.
[TIMEOFDAY]
declaration=
category=Date and Time Functions
description=TIMEOFDAY is a special alias used to return the weekday, date, and time as a string value.
[TIMESTAMPTZ_CMP]
declaration=timestamptz1,timestamptz2
category=Date and Time Functions
description=TIMESTAMPTZ_CMP compares the value of two time stamp with time zone values and returns an integer. If the time stamps are identical, the function returns 0. If the first time stamp is greater alphabetically, the function returns 1. If the second time stamp is greater, the function returns –1.
[TIMESTAMPTZ_CMP_DATE]
declaration=timestamptz,date
category=Date and Time Functions
description=TIMESTAMPTZ_CMP_DATE compares the value of a time stamp and a date. If the time stamp and date values are identical, the function returns 0. If the time stamp is greater alphabetically, the function returns 1. If the date is greater, the function returns –1.
[TIMESTAMPTZ_CMP_TIMESTAMP]
declaration=timestamptz,timestamp
category=Date and Time Functions
description=TIMESTAMPTZ_CMP_TIMESTAMP compares the value of a time stamp with time zone expression with a time stamp expression. If the time stamp with time zone and time stamp values are identical, the function returns 0. If the time stamp with time zone is greater alphabetically, the function returns 1. If the time stamp is greater, the function returns –1.
[TIMESTAMP_CMP]
declaration=timestamp1,timestamp2
category=Date and Time Functions
description=Compares the value of two time stamps and returns an integer. If the time stamps are identical, the function returns 0. If the first time stamp is greater alphabetically, the function returns 1. If the second time stamp is greater, the function returns –1.
[TIMESTAMP_CMP_DATE]
declaration=timestamp,date
category=Date and Time Functions
description=TIMESTAMP_CMP_DATE compares the value of a time stamp and a date. If the time stamp and date values are identical, the function returns 0. If the time stamp is greater alphabetically, the function returns 1. If the date is greater, the function returns –1.
[TIMESTAMP_CMP_TIMESTAMPTZ]
declaration=timestamp,timestamptz
category=Date and Time Functions
description=TIMESTAMP_CMP_TIMESTAMPTZ compares the value of a time stamp expression with a time stamp with time zone expression. If the time stamp and time stamp with time zone values are identical, the function returns 0. If the time stamp is greater alphabetically, the function returns 1. If the time stamp with time zone is greater, the function returns –1.
[TIMEZONE]
declaration=timezone,timestamp,timestamptz
category=Date and Time Functions
description=TIMEZONE returns a time stamp for the specified time zone and time stamp value.
[TO_CHAR]
declaration=timestamp_expression,numeric_expression,format
category=Data Type Formatting Functions
description=TO_CHAR converts a time stamp or numeric expression to a character-string data format.
[TO_DATE]
declaration=string,format
category=Data Type Formatting Functions
description=TO_DATE converts a date represented in a character string to a DATE data type.
[TO_HEX]
declaration=number
category=Math Functions
description=The TO_HEX function converts a number to its equivalent hexadecimal value.
[TO_NUMBER]
declaration=string,format
category=Data Type Formatting Functions
description=TO_NUMBER converts a string to a numeric (decimal) value.
[TO_TIMESTAMP]
declaration=timestamp,format
category=Date and Time Functions
description=TO_TIMESTAMP converts a TIMESTAMP string to TIMESTAMPTZ.
[TRANSLATE]
declaration=expression,characters_to_replace,characters_to_substitute
category=String Functions
description=For a given expression, replaces all occurrences of specified characters with specified substitutes. Existing characters are mapped to replacement characters by their positions in the characters_to_replace and characters_to_substitute arguments. If more characters are specified in the characters_to_replace argument than in the characters_to_substitute argument, the extra characters from the characters_to_replace argument are omitted in the return value.
[TRIM]
declaration=characters,string
category=String Functions
description=The TRIM function trims a string by removing leading and trailing blanks or by removing characters that match an optional specified string.
[TRUNC]
declaration=number,integer,timestamp
category=Math Functions
description=The TRUNC function truncates a number and right-fills it with zeros from the position specified. This function also truncates a time stamp and returns a date.
[TRUNC]
declaration=timestamp
category=Date and Time Functions
description=Truncates a time stamp and returns a date.
[UPPER]
declaration=string
category=String Functions
description=Converts a string to uppercase. UPPER supports UTF-8 multibyte characters, up to a maximum of four bytes per character.
[USER]
declaration=
category=System Information Functions
description=Synonym for CURRENT_USER. See CURRENT_USER.
[VAR_POP]
declaration=
category=Aggregate Functions
description=The VAR_SAMP and VAR_POP functions return the sample and population variance of a set of numeric values (integer, decimal, or floating-point). The result of the VAR_SAMP function is equivalent to the squared sample standard deviation of the same set of values.
[VAR_SAMP]
declaration=
category=Aggregate Functions
description=The VAR_SAMP and VAR_POP functions return the sample and population variance of a set of numeric values (integer, decimal, or floating-point). The result of the VAR_SAMP function is equivalent to the squared sample standard deviation of the same set of values.
[VERSION]
declaration=
category=System Information Functions
description=The VERSION() function returns details about the currently installed release, with specific Amazon Redshift version information at the end.

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Code Editor : functions-redshift.ini