SQL

Question

我有两张桌子：CONFIRMATION＆amp; CONFIRMATION_PRESS

CONFORMATION 表如下所示：

ID_CONF   |  ID_LOT |  QTY
1005         175       25
1006         175       24
1007         175       23
1008         176       50

CONFIRMATION_PRESS 表如下所示：

ID_CONF |  ID_PRESS
1005       11
1005       22
1005       33
1006       12
1006       13
1007       14

现在我想从CONFIRMATION表中获取ID_LOT = 175的所有数据，但我需要以逗号分隔值的ID_PRESS。

例如，对于ID_LOT 175，应显示以下结果：

ID CONF | ID_LOT | QTY | ID_PRESS
--------+--------+-----+----------
1005      175      25    11,22,33
1006      175      24     12,13
1007      175      23     14

我的查询如下：

SELECT
    C.ID_CONF,
    C.QTY,
    C.ID_LOT,
    STUFF((  
      SELECT CAST(',' AS VARCHAR(MAX)) + CAST(CP.ID_PRESS AS VARCHAR(5))
      FROM CONFIRMATION C,
           CONFIRMATION_PRESS CP
      WHERE
          C.ID_CONF = CP.ID_CONF
      FOR XML PATH('')), 1, 1, '') PRESS_CSV
FROM
    CONFIRMATION C 
WHERE 
    C.ID_LOT = 175

但它返回此输出：

 ID CONF | ID_LOT | QTY | ID_PRESS
 --------+--------+-----+------------------
 1005       175      25    11,22,33,12,13
 1006       175      24    11,22,33,12,13
 1007       175      23    11,22,33,12,13

我在这里做错了什么？

请帮忙！

问候！

Answer 1

不要再次加入子查询上的CONFIRMATION表。您需要与主查询相关的行。

SELECT
   C.ID_CONF,
   C.QTY,
   C.ID_LOT,
   STUFF((  
      SELECT CAST(',' AS VARCHAR(MAX)) + CAST(CP.ID_PRESS AS VARCHAR(5))
      FROM CONFIRMATION_PRESS CP
      WHERE CP.ID_CONF = C.ID_CONF
      FOR XML PATH('')), 1, 1, '') PRESS_CSV    
FROM CONFIRMATION C 
WHERE C.ID_LOT = 175

Answer 2

Begin Tran
Create Table CONFIRMATION  (ID_CONF Int,ID_LOT Int,QTY numeric)
INSert into CONFIRMATION
Select 1005,175,25 Union All
Select 1006,175,24  Union All
Select 1007,175,23 Union All
Select 1008,176,50

Create Table CONFIRMATION_PRESS (ID_CONF int ,ID_PRESS INt )
Insert into CONFIRMATION_PRESS
Select 1005,11 Union All
Select 1005,22 Union All
Select 1005,33 Union All
Select 1006,12 Union All
Select 1006,13 Union All
Select 1007,14

--Select *from CONFIRMATION Inner Join
--CONFIRMATION_PRESS On  CONFIRMATION_PRESS.ID_CONF=CONFIRMATION.ID_CONF
--Where CONFIRMATION.ID_LOT=175


SELECT
    C.ID_CONF,
    C.QTY,
    C.ID_LOT,
    STUFF((  
            SELECT  ', ' +  CONVERT(Nvarchar,CP.ID_PRESS)
            from  
            CONFIRMATION_PRESS CP

      WHERE
          C.ID_CONF = CP.ID_CONF
      FOR XML PATH('')), 1, 2, '') PRESS_CSV
FROM
    CONFIRMATION C 
WHERE 
    C.ID_LOT = 175

RollBack Tran