(1) In SQL, a symbol used in comparison expressions to specify a relationship between two values. Comparison operators are = (equal to), <> (not equal to), < (less than), > (greater than), <= (less than or equal to), and >= (greater than or equal to).
(2) In REXX, an operator that compares two terms and returns the value 1 if the result of the comparison is true, or 0 if it is not true.