String

Function Name	Description
ASCII	Returns the ASCII code for the first character of a string. If the string is empty, 0 is returned.
BASE64	Returns the Base64 encoding of a binary string.
BTRIM	Trims leading and trailing characters from a string.
CHARACTER_LENGTH	Returns the length of an input string.
CHAR_LENGTH	Returns the character length of the input string.
CHR	Converts a Unicode code point into the character that matches the input Unicode character. If an invalid code point is specified, an empty string is returned.
COL_LIKE	Tests whether an expression column matches a pattern column. Comparisons are case-sensitive.
CONCAT	Concatenates two or more strings. NULL values are ignored.
CONCAT_WS	Concatenate with separator. Returns a string resulting from the joining of two or more string values in an end-to-end manner. Uses the first argument as the separator between each string.
ENDS_WITH	Returns whether a string ends with another string. The comparison is case-sensitive.
FROM_HEX	Returns a binary value for the given hexadecimal string.
HEX	Returns the hexadecimal encoding of an expression.
ILIKE	Tests whether an expression matches a pattern. The comparison is case-insensitive.
INITCAP	Returns the input string with the first letter of each word in uppercase and the subsequent letters in the word are in lowercase).
INSTR	Returns the position of the first occurrence of a string when it is contained in another string. If no such occurrence is found, a zero is returned. The comparison is case-sensitive.
IS_UTF8	Returns whether an expression is valid UTF-8.
LCASE	Returns the input expression with all the characters converted to lowercase.
LEFT	Returns the left-most substring. The function name must be enclosed in double quotes ("LEFT").
LENGTH	Returns the length of an input string. If the character encoding isn’t specified, it assumes to UTF8.
LEVENSHTEIN	Computes the Levenshtein distance between two input expressions.
LIKE	Tests whether an expression matches one or more patterns. Comparisons are case-sensitive.
LOCATE	Searches for the first occurrence of the first argument in the second argument and if found, returns the position the of the first argument in the second argument. The first character in a string is position 1. Returns 0 if the substring isn’t found in the expression.
LOWER	Returns the input expression with all the characters converted to lowercase.
LPAD	Left pads a string with spaces or specified characters to reach the number of characters specified as a parameter.
LTRIM	Removes leading spaces or characters from a string.
MASK	Returns a masked version of a string.
MASK_FIRST_N	Returns a masked version of a string with the first num_chars characters masked. By default, if you do not provide a mask value, the first four characters are masked.
MASK_HASH	Returns a consistent hash value based on the input string. This function returns NULL for non-string types.
MASK_LAST_N	Returns a masked version of a string with the last num_chars characters masked. By default, if you do not provide a mask value, the last four characters are masked.
MASK_SHOW_FIRST_N	Returns a masked version of a string with the first num_chars characters unmasked. By default, if you do not provide a value, the first four characters are shown.
MASK_SHOW_LAST_N	Returns a masked version of a string with the last num_chars characters unmasked. By default, if you do not provide a value, the last four characters are shown.
OCTET_LENGTH	Returns the length of the string in bytes.
POSITION	Returns the position of the first occurrence of a substring within another string.
QUOTE	Returns a result that can be used as a properly escaped data value in a SQL statement.
REGEXP_EXTRACT	Extracts the first string in expression that matches the REGEXP expression and corresponds to the REGEX group index.
REGEXP_LIKE	Returns true when the specified regular expression matches values in a column. Otherwise, returns false.
REGEXP_MATCHES	Returns true when the specified regular expression matches values in a column. Otherwise, returns false.
REGEXP_REPLACE	Finds strings that match the given regular expression and replaces the strings with the given string.
REGEXP_SPLIT	Splits an input string by using a regular expression according to a keyword and an integer value.
REPEAT	Builds a string by repeating the input for the specified number of times.
REPEATSTR	Repeats the given string n times.
REPLACE	Removes all occurrences of a specified substring and replaces them with another string.
REVERSE	Reverses the order of characters in a string.
RIGHT	Returns the right-most substring. The function name must be enclosed in double quotes (“RIGHT”).
RPAD	Right pads a string with spaces or specified characters to reach the number of characters specified as a parameter.
RTRIM	Removes trailing spaces or characters from a string.
SIMILAR_TO	Tests whether the entire expression matches a pattern.
SOUNDEX	Returns a string that contains a phonetic representation of the input string.
SPLIT_PART	Splits a given string at a specified character and returns the requested part.
STARTS_WITH	Returns whether a string starts with another string. The comparison is case-sensitive.
STRPOS	Searches for the first occurrence of the substring in the given expression and returns the position of where the substring begins. Searching binary values is also supported.
SUBSTRING	Returns the portion of the string from the specified base expression starting at the specified characters.
SUBSTRING_INDEX	Returns a substring of an expression before the specified number of delimiters occurs.
TOASCII	Converts a string that is encoded in the specified character set to UTF-8.
TO_HEX	Returns a hexadecimal string for the given binary value.
TRANSLATE	Translates the base expression from the source characters/expression to the target characters/expression.
TRIM	Removes leading, trailing, or both spaces or characters from a string.
UCASE	Returns the input expression with all the characters converted to uppercase.
UNBASE64	Decodes a Base64-encoded string.
UNHEX	Converts the hexadecimal number into the bytes represented by a number.
UPPER	Returns the input expression with all the characters converted to uppercase.