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要是T-SQL就太容易了: "select T1.A,T1.B from T T1 join T T2 ON T1.A=T2.A anf T1.B <> T2.B Group By T1.A,T1.B"
benbendan
(笨笨蛋)
(#266310@0)
Last Updated: 2001-11-18
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闲来无事, 出道ORACLE SQL的题考考大家. 这是在下几个月前工作中遇到的问题, 看似简单, 其实不然.
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