PostgreSQL Subquery: Find the names of the employees who works in the IT department
2. Write a SQL subquery to find the first_name and last_name of all employees who works in the IT department.
SELECT first_name, last_name FROM employees WHERE department_id IN (SELECT department_id FROM departments WHERE department_name='IT');
Sample table: employees
pg_exercises=# SELECT first_name, last_name pg_exercises-# FROM employees pg_exercises-# WHERE department_id pg_exercises-# IN (SELECT department_id pg_exercises(# FROM departments pg_exercises(# WHERE department_name='IT'); first_name | last_name ------------+----------- Alexander | Hunold Bruce | Ernst David | Austin Valli | Pataballa Diana | Lorentz (5 rows)
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