sql not null
SELECT column_name FROM table_name
WHERE column_name IS NOT NULL;sql not null
SELECT column_name FROM table_name
WHERE column_name IS NOT NULL;how to check if a column is null in sql
SELECT column_name FROM table_name
WHERE column_name IS NULL;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;get null in sql
SELECT * FROM EMPLOYEES
WHERE MANAGER_ID IS NULL ;Copyright © 2021 Codeinu
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