Question

我在SQL Server Management Studio 2012中有一个UPDATE查询，它没有给我预期的结果。我相信这是因为我必须将IJDATE字段添加到SELECT和GROUP BY，因此它不能正确求和。我正在尝试更新每个供应商的当前月份/年份。有没有更好的方法来编写此UPDATE查询？

UPDATE S
SET S.PurchaseDlr = I.PurchaseDlr
FROM (SELECT 
          IJVEND,
          IJDATE,
          SUM(IJQTY * IJCOST) AS PurchaseDlr
      FROM
          dbo.S2K_IJ
      WHERE
          IJTYPE IN ('I','ID')
      GROUP BY
          IJVEND,
          IJDATE) I
INNER JOIN PurchaseDollars S on I.IJVEND = S.Vendor AND S.MonthNum = MONTH(I.IJDATE) AND S.Year = YEAR(I.IJDATE)

Answer 1

您按日期分组，但看起来您希望按月和年分组：

UPDATE S
SET S.PurchaseDlr = I.PurchaseDlr
FROM (SELECT 
          IJVEND,
          MONTH(IJDATE) AS Month,
          YEAR(IJDATE) AS Year,
          SUM(IJQTY * IJCOST) AS PurchaseDlr
      FROM
          dbo.S2K_IJ
      WHERE
          IJTYPE IN ('I','ID')
      GROUP BY
          IJVEND,
          MONTH(IJDATE),
          YEAR(IJDATE)) I
INNER JOIN PurchaseDollars S 
    ON I.IJVEND = S.Vendor 
        AND S.MonthNum = I.Month
        AND S.Year = I.Year

T-SQL UPDATE查询未给出预期结果

1 个答案: