string REGEXP pattern
Description: Looks for pattern within string, performing a pattern-match comparison using extended regular expressions, returning TRUE if a match is obtained or FALSE if not.
Note that any \ that you use as an escape character within pattern must be doubled—that is, you must use \\.
Examples:
'Smith' RLIKE '^sm' returns 1.
'Smith' RLIKE BINARY '^sm' returns 0.
'Smith' RLIKE '[0-9]$' returns 0.
'Smith45' RLIKE '[0-9]$' returns 1.
'Line1\nLine2' RLIKE '\\n' returns 1.
See also: LIKE, and Day 10, “Operators and Functions in MySQL,” for more about regular expressions
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