--实现代码：
SELECT SN,SD FROM S
WHERE [S#] IN(
SELECT [S#] FROM SC
RIGHT JOIN C ON SC.[C#]=C.[C#]
GROUP BY [S#]
HAVING COUNT(*)=COUNT(DISTINCT [S#]))[@more@]
SELECT SN,SD FROM S
WHERE [S#] IN(
SELECT [S#] FROM SC
RIGHT JOIN C ON SC.[C#]=C.[C#]
GROUP BY [S#]
HAVING COUNT(*)=COUNT(DISTINCT [S#]))[@more@]
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/8591181/viewspace-892429/ ，如需转载，请注明出处，否则将追究法律责任。
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