sqlite update where exists

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19 Jul 2020

1UPDATE employees
2SET hire_date = (SELECT departments.start_date
3                 FROM departments
4                 WHERE departments.department_id = employees.department_id
5                 AND departments.department_name = 'HR')
6WHERE EXISTS (SELECT *
7              FROM departments
8              WHERE departments.department_id = employees.department_id
9              AND departments.department_name ='HR');

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