In almost every case you test for someVal != null or someVal == null (which is almost the only case where == is preferable to ===) And on the other hand sql ma

In almost every case you test for someVal != null or someVal == null (which is almost the only case where == is preferable to ===) And on the other hand sql made the opposite mistake where NULL means both "this field has an empty value" and "this field does not have a value"