The list of string functions is quite long, but many perform similar roles. The following list groups the functions by these roles.
ASCII(), BIN(), BINARY, CAST(), CHAR(), COMPRESS(), CONVERT(), EXPORT_SET(), HEX(), MAKE_SET(), ORD(), SOUNDEX(), UNCOMPRESS(), UNHEX().
CONCAT(), CONCAT_WS(), LCASE(), LENGTH(), LOWER(), LPAD(), LTRIM(), OCTET_LENGTH(), QUOTE(), RPAD(), RTRIM(), SPACE(), TRIM(), UCASE(), UPPER().
BIT_LENGTH(), CRC32(), CHAR_LENGTH(), CHARACTER_LENGTH(), ELT(), FIELD(), FIND_IN_SET(), INSTR(), INTERVAL(), LOCATE(), MATCH() AGAINST(), POSITION(), STRCMP(), UNCOMPRESSED_LENGTH().
LEFT(), LOAD_FILE(), MID(), RIGHT(), SUBSTR(), SUBSTRING(), SUBSTRING_INDEX().