Comparison operations result in a value of 1 (TRUE), 0 (FALSE), or NULL.
Comparison Functions and Operators work for both numbers and strings.
Strings are converted to numbers and numbers to strings as necessary.
By default, string comparisons are not case sensitive and use the current character set.
NameDescription
BETWEEN ANDCheck whether a value is within a range of values
COALESCE()Return the first non-NULL argument
NULL-safe equal to operator
=Equal operator
=Greater than or equal operator
Greater than operator
GREATEST()Return the largest argument
INCheck whether a value is within a set of values
INTERVAL()Return the index of the argument that is less than the first argument
IS NULLNULL value test
ISTest a value against a boolean
ISNULL()Test whether the argument is NULL
LEAST()Return the smallest argument
Less than or equal operator
Less than operator
LIKESimple pattern matching
NOT BETWEEN ... AND ...Check whether a value is not within a range of values
!=, Not equal operator
NOT INCheck whether a value is not within a set of values
NOT LIKENegation of simple pattern matching
SOUNDS LIKECompare sounds
Quote: dev.mysql.com/doc/refman/5.1/en/index.html