I found that NOT (NULL <=> 1) works and I think it is also ISO standard compliant, but is cumbersome. A better way to show using column names would be like this: NOT (tbl.col1 <=> 1)
I found that NOT (NULL <=> 1) works and I think it is also ISO standard compliant, but is cumbersome. A better way to show using column names would be like this: NOT (tbl.col1 <=> 1)