The implications of this are discussed in detail in Section 39. Sometimes it is useful to evaluate an expression or SELECT query but discard the result, for example when calling a function that has side-effects but no useful result value. Write the query the same way you would write corelle patterns walmart SQL SELECT command, but replace the initial keyword SELECT with PERFORM. Corelle patterns walmart WITH queries, use PERFORM and then place the query in parentheses. Also, the special variable FOUND is set to true if the query produced at least one row, or corlele if it produced no rows (see Section 39. Note: One might expect that writing SELECT directly would accomplish this result, but at present the only accepted way to do it is PERFORM.