SQL

sql count null

/*Writing an aggregated column
Assuming the column/field name is 'col'*/
SUM(CASE WHEN col IS NULL THEN 1 ELSE 0 END) count_nulls

/*OR*/

COUNT(*)-COUNT(col) count_nulls

how to count null values in sql

SELECT COUNT(1) FROM my_table WHERE my_column IS NULL;

SQL IS NULL With COUNT()

SELECT COUNT(*)
FROM Employee
WHERE email IS NULL;