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859天前SELECT T.TNo,TN,CNo |
FROM T,TC |
WHERE (T.TNo = TC.TNo)AND (TN='刘伟') |
|
SELECT T.TNo,TN,CNo |
FROM T,TC |
WHERE(TN='刘伟') |
|
SELECT S.SNo,SN,CN,Score |
FROM S,C,SC |
WHERE (S.SNo = SC.SNo)AND (SC.CNo=C.CNo) |
|
SELECT S.SNo,SN,CN,Score |
FROM S,C,SC |
|
SELECT C.CNo,CN,COUNT(SC.SNo) as 选课人数 |
FROM C,SC |
WHERE (SC.CNo=C.CNo) |
GROUP BY C.CNo,CN |
|
SELECT C.CNo,COUNT(SC.SNo) as 选课人数 |
FROM C,SC |
WHERE (SC.CNo=C.CNo) |
GROUP BY C.CNo |
|
SELECT * |
FROM S CROSS JOIN C |
|
SELECT X.TN,X.Sal AS SaL_a,Y.Sal AS Sal_b |
FROM T AS X ,T AS Y |
WHERE X.Sal>Y.Sal AND Y.TN='刘伟' |
SELECT SN,Age,CN |
FROM S,C,SC |
WHERE S.SNo = SC.SNo AND SC.CNo = C.CNo |
