Введение в модель данных SQL

WHERE DEPT_NO IS NOT


WITH DEPT_MAX_SAL (MAX_SAL, TOTAL_EMP) AS
(SELECT MAX (EMP_SAL), COUNT (*)
FROM EMP
WHERE DEPT_NO IS NOT NULL
GROUP BY DEPT_NO)
SELECT SUM (TOTAL_EMP), MAX_SAL
FROM DEPT_MAX_SAL
GROUP BY MAX_SAL;

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