Relational_Operators

 A  relational  operator  tests  the  relationship  between   two
 ordinal,  real,  DOUBLE,  or QUADRUPLE expressions and returns a
 Boolean value.  If the relationship holds, the result  is  TRUE;
 otherwise  the  result is FALSE.  You can also apply some of the
 relational operators to string operands and to set operators.

 Relational Operators:

    operator  |  example  |  result
    --------------------------------------------
       =          A = B      TRUE if A is equal to B
       <>         A <> B     TRUE if A is not equal to B
       <          A < B      TRUE if A is less than B
       <=         A <= B     TRUE if A is less than or equal to B
       >          A > B      TRUE if A is greater than B
       >=         A >= B     TRUE if A is greater than or equal to B