SQL_LeetCode 1978_Employees Whose Manager Left the Company 풀이 -- ORACLE, MYSQL, MSSQL SELECT EMPLOYEE_ID FROM EMPLOYEES WHERE SALARY < 30000 AND MANAGER_ID IS NOT NULL AND MANAGER_ID NOT IN( SELECT EMPLOYEE_ID FROM EMPLOYEES ) ORDER BY EMPLOYEE_ID; * 출처 https://leetcode.com/problems/employees-whose-manager-left-the-company...
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