variant_mul multiplies the values of the two variants and returns the result mixedvariant_mul mixedleft mixedright Multiplies left by right and returns the result, subject to the following rules: If Then Both expressions are of the string, date, character, boolean type Multiplication One expression is a string type and the other a character Multiplication One expression is numeric and the other is a string Multiplication Both expressions are numeric Multiplication Either expression is NULL NULL is returned Both expressions are empty Empty string is returned Boolean values are converted to -1 for &false; and 0 for &true;. See also variant_div, variant_idiv. &reference.com.variant-arith;