positionb

Returns an integer that is relative to the beginning byte position of "string_expression1" in "string_expression2". If "string_expression1" is not located, the result is 0. If "string_expression1" is of zero length, the result is 1. If "string_expression1" is null, an error message is returned. If "string_expression2" is null, the result is 0.

positionb ( string_expression1, string_expression2 )