FROM EMP EMP1, EMP
SELECT DEPT.DEPT_NO
FROM DEPT
WHERE NOT EXISTS
(SELECT *
FROM EMP EMP1, EMP EMP2
WHERE EMP1.EMP_NO = DEPT.DEPT_MNG AND
EMP2.DEPT_NO = DEPT.DEPT_NO AND
EMP2.EMP_SAL > EMP1.EMP_SAL);
Введение в модель данных SQL
SELECT DEPT.DEPT_NO
FROM DEPT
WHERE NOT EXISTS
(SELECT *
FROM EMP EMP1, EMP EMP2
WHERE EMP1.EMP_NO = DEPT.DEPT_MNG AND
EMP2.DEPT_NO = DEPT.DEPT_NO AND
EMP2.EMP_SAL > EMP1.EMP_SAL);