Question

我正在尝试将3个不同的表合并为一个查询中的一行，但是存在一些问题。目前我有四个桌子。 PaintSched，Painted_Log，Paint_Defect和Paint_Inspection。

PaintSched-单一条目，当计划程序仅计划要绘制的某些零件时

LOT QTY
1   150
2   100

Painted_Log-然后油漆部门拿了很多，并说出他们能够油漆多少

LOT(FK) QTYPainted
1       145
2       100

Paint_Defect-涂完零件后进行涂漆检查的缺陷主清单。我们手工检查我们喷涂的所有零件的质量。

 DID   Defect
 1     Scratch
 2     Paint Run

Paint_Inspection-每次发现缺陷时，检查员都会点击一个相关按钮，并记录以下内容。 Lot是FK，DID代表Paint_Defect中的缺陷ID。数量始终为1

Lot(FK)  DID(FK) QTY
1        1       1
1        1       1
1        2       1
1        1       1
2        2       1
1        2       1
2        1       1

我想要得到的是以下输出：

Lot Sched Painted Scratch Paint Run
1   150   145     3       2
2   100   100     1       1

我已经尝试了以下方法：

 SELECT PaintSched.Scheduled,   PaintSched.Lot,    PaintSched.qty,   PaintSched.Is_Painted,   Painted_Log.falloff 
 FROM PaintSched   
   INNER JOIN Painted_Log ON PaintSched.Lot = Painted_Log.lot   
   INNER JOIN MPA_Desc ON MPA_Desc.MPAID = PaintSched.MPAID   
   inner JOIN (
     SELECT lot,  sum(Paint_Inspection.qty) as seds   
     FROM Paint_Inspection   
     WHERE Paint_Inspection.Status = '1'
   ) AS seeds ON PaintSched.Lot = Paint_Inspection.Lot

Answer 1

两件事：

您应该在子查询中添加一个分组依据
为子查询添加别名时，您无法正确加入该子查询

在下面查看对查询的修改：

SELECT 
  PaintSched.Scheduled,   
  PaintSched.Lot,    
  PaintSched.qty,   
  PaintSched.Is_Painted,   
  Painted_Log.falloff 
FROM PaintSched   
INNER JOIN Painted_Log ON PaintSched.Lot = Painted_Log.lot   
INNER JOIN MPA_Desc ON MPA_Desc.MPAID = PaintSched.MPAID   
INNER JOIN (
    SELECT lot,  sum(Paint_Inspection.qty) as seds   
    FROM Paint_Inspection   
    WHERE Paint_Inspection.Status = '1'
    GROUP BY Paint_Inspection.lot -- Missing GROUP BY
  ) AS seeds 
ON PaintSched.Lot = seeds.Lot

Answer 2

SELECT 
  PS.Lot,
  PS.Qty Sched,
  Painted,
  Scratch,
  PaintRun
FROM PaintSched PS
   LEFT JOIN (SELECT
                Lot,
                SUM(QTYPainted) Painted
              FROM Painted_Log GROUP BY Lot) PL
     ON PS.Lot = PL.Lot
   LEFT JOIN (SELECT
                Lot,
                SUM(CASE WHEN DID = 1 THEN 1 ELSE 0 END) Scratch,
                SUM(CASE WHEN DID = 2 THEN 1 ELSE 0 END) PaintRun
              FROM Paint_Inspection GROUP BY Lot) PI
      ON PS.Lot = PI.Lot

Try that in SQL Fiddle

上面的代码使用条件和将缺陷计数按类型汇总，然后再将其加入到批号中。如果您有2种以上的状态，则需要相应地更新上述代码。

组合SQL表以获得一种信息来源

2 个答案: