How to check if any column has null value in sql Put this condition in the WHERE clause to filter rows (in our example, WHERE middle_name IS NULL). Jun 6, 2024 · We can use the function NULLIF to compare and check if the column contains null or empty values: SELECT id, name FROM Department WHERE NULLIF(TRIM(code), '') IS NULL; The NULLIF function evaluates its two arguments, returning NULL if they are equal. The other query presented has to evaluate after applying an ISNULL() function. Filtering rows with NULL values on multiple columns involves applying the filter() transformation with multiple conditions using logical operators such as and or or. SELECT * FROM table AS t WHERE t. It returns TRUE if a non-NULL value is found and FALSE otherwise. The fundamental syntax to set a column value to NULL is as follows. So, to guarantee you won't get Null you have to write: IsNull(Sum(Col1),0) Observe example: If you want to set null value using update query set column value to NULL (without quotes) update tablename set columnname = NULL . cost') IS NOT NULL; WHERE JSON_EXTRACT(colname, '$. SELECT * FROM yourTable WHERE GREATEST(col1, col2, col3, col4) IS NULL; The above call to GREATEST would only be NULL if at least one of the four columns have a NULL value. yjpd hbnfuftr hwn ugklv rbb waphm elixfo hsiocc njre jkntp wugero fyyqe qqti dgun ytg