mariadb-string-functions

MariaDB string functions — extraction (SUBSTRING/SUBSTR, LEFT, RIGHT, MID, SUBSTRING_INDEX); length in bytes (LENGTH/OCTET_LENGTH/LENGTHB) vs characters (CHAR_LENGTH/CHARACTER_LENGTH); search (LOCATE, INSTR, POSITION, FIND_IN_SET, FIELD); concatenation (CONCAT, CONCAT_WS); modification (REPLACE, INSERT, REVERSE, REPEAT, SPACE, LPAD/RPAD, TRIM/LTRIM/RTRIM); case (LOWER/UPPER); PCRE2 regular expressions (REGEXP/RLIKE, REGEXP_REPLACE, REGEXP_INSTR, REGEXP_SUBSTR); formatting (FORMAT, SFORMAT); encoding (HEX/UNHEX, TO_BASE64/FROM_BASE64, ASCII, CHAR, ORD); plus the LIKE, REGEXP, SOUNDS LIKE, and BINARY operators. Use when writing SQL that searches, slices, pads, concatenates, case-folds, or pattern-matches string data in MariaDB.