where is null code example
Example 1: sql not null
SELECT column_name FROM table_name
WHERE column_name IS NOT NULL;
Example 2: how to check if a column is null in sql
SELECT column_name FROM table_name
WHERE column_name IS NULL;
Example 3: sql is null
Tests for empty (NULL) values.
Example: Returns users that haven’t given a contact number.
SELECT * FROM users
WHERE contact_number IS NULL;