Question

我正在创建SQL查询，它将更新表A＆＃39;的数量。来自表B＆＃39;。但是，表B中的几个字段不是总和，它们的最新值（基于日期顺序的第一行或最后一行值）也要在表A＆＃39;中更新。下面是查询信息。

UPDATE r
SET r.Completed = t.MoveQty, r.Scrapped = t.ScrapQty, r.ReWork = t.ReworkQty
FROM JobRoutings r
INNER JOIN
(
  SELECT JobID, ScanFromProcessID, SUM(ScanMoveQty) MoveQty, Sum(ScanScrapQty) ScrapQty, Sum(ScanRecutQty) ReworkQty
  FROM JobTrans
  GROUP BY  JobID, ScanFromProcessID
) t ON r.JobID = t.JobID AND r.ProcessID  = t.ScanFromProcessID;

上述查询中需要包含的字段为：

[JobTrans]的最新值.ScannedDate和[JobTrans]。PC [ORDER BY ScannedDate]需要更新[JobRoutings]。LastScanDate和[JobRoutings] .PC

Answer 1

这是一种连接第二个子查询并使用ROW_NUMBER（）获取最新PC / ScannedDate值的方法：

UPDATE r
SET r.Completed = t.MoveQty, r.Scrapped = t.ScrapQty, r.ReWork = t.ReworkQty, r.LastScanDate = t.ScannedDate, r.PC = t.PC
FROM JobRoutings r
INNER JOIN
(
  SELECT JobTrans.JobID, JobTrans.ScanFromProcessID, t2.ScannedDate, t2.PC, SUM(ScanMoveQty) MoveQty, Sum(ScanScrapQty) ScrapQty, Sum(ScanRecutQty) ReworkQty
  FROM JobTrans 
  INNER JOIN
  (
      SELECT JobID, ScanFromProcessID, ScannedDate, PC, ROW_NUMBER() OVER (PARTITION BY JobID, ScanFromProcessID ORDER BY ScannedDate DESC) AS rn
      FROM JobTrans
  )t2 ON JobTrans.JobID = t2.JobID AND JobTrans.ScanFromProcessID = t2.ScanFromProcessID AND t2.rn = 1
  GROUP BY  JobTrans.JobID, JobTrans.ScanFromProcessID, t2.ScannedDate, t2.PC
) t ON r.JobID = t.JobID AND r.ProcessID  = t.ScanFromProcessID

SQL Update查询来自另一个表的sum和first行

1 个答案: