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IS NULL OPERATOR Let’s list the employees that have manager. SELECT first_name,last_name, manager_id FROM hr.employees WHERE manager_id IS not NULL; LOGICAL OPERATORS AND : It returns TRUE if all …
Read More »IS NULL OPERATOR Let’s list the employees that have manager. SELECT first_name,last_name, manager_id FROM hr.employees WHERE manager_id IS not NULL; LOGICAL OPERATORS AND : It returns TRUE if all …
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