WHERE DEPT_NO IS NOT
SELECT DEPT_NO
FROM EMP
WHERE DEPT_NO IS NOT NULL
GROUP BY DEPT_NO
HAVING SUM(EMP_SAL) < (SELECT SUM(EMP1.EMP_SAL)
FROM EMP EMP1, DEPT
WHERE EMP1.EMP_NO = DEPT_MNG);
Введение в модель данных SQL
SELECT DEPT_NO
FROM EMP
WHERE DEPT_NO IS NOT NULL
GROUP BY DEPT_NO
HAVING SUM(EMP_SAL) < (SELECT SUM(EMP1.EMP_SAL)
FROM EMP EMP1, DEPT
WHERE EMP1.EMP_NO = DEPT_MNG);