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我觉的可以用一个减操作，但好久未用oracle,忘了名字。取出全部记录，然后减A为单一值的记录，行不？

rabbitbug(兔八哥)

云MM的SQL嵌套速度有很大影响，如果记录数一多，虽然简洁.

(#260724@0)
Last Updated: 2001-11-14
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