ms sql count distinct multiple columns的相關文章
none COUNT(DISTINCT COL1,COL2) - MSDN - Microsoft

none COUNT(DISTINCT COL1,COL2) - MSDN - Microsoft

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日期:2026-04-25
Is there any reason that sql doesnt support a distinct on 2 columns..i mean .... Here is one example of getting distinct count on multiple columns ......看更多