leetcodeSolution to some Leetcode problems written in C++ |
| git clone git://git.dimitrijedobrota.com/leetcode.git |
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1789.sql (181B)
1 SELECT employee_id, department_id 2 FROM Employee 3 GROUP BY employee_id 4 HAVING COUNT(department_id) = 1 5 UNION 6 SELECT employee_id, department_id 7 FROM Employee 8 WHERE primary_flag = 'Y'