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WITHIN Expression

set-expression WITHIN set-expression

set-expression NOT WITHIN set-expression

The WITHIN expression returns 1 if the left operand set is a subset of the right operand set and returns 0 otherwise. (That is, the operator returns true if every member of the left operand set is a member of the right operand set.) The NOT WITHIN form logically negates the result value. The following code demonstrates the WITHIN and NOT WITHIN operators:

  
    proc optmodel; 
       put ({1,3} within {2,3});     /* outputs 0 */ 
       put ({1,3} not within {2,3}); /* outputs 1 */ 
       put ({1,3} within {1,2,3});   /* outputs 1 */