IS null in SQL pivot?
IS null in SQL pivot? 1 Answer. The SQL value null represents the absence of data, so when you pivot and a cell as no data a null will perforce be generated as the cell value. It is your responsibility as the programmer to coalesce the null to whatever domain value is appropriate for missing data, when that makes sense. Can you SUM null in SQL? MySQL and PostgreSQL cannot sum up NULL values with the + value. The sum value will be NULL . If you want to do additions in the database: use SUM if it's an option...