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1.SELECT A.EMPLOYEEID, A.GZ
FROM EMPLOYEE A
WHERE EXISTS (SELECT 1
FROM (SELECT AVG(GZ) "avg_gz" FROM EMPLOYEE) B
WHERE T.GZ > b."avg_gz")
2.SELECT A.DEPTID
FROM EMPLOYEE A
WHERE A.SEX = '女'
GROUP BY A.DEPTID, A.SEX
HAVING COUNT(1) > 5
3.这个不祥