Question

我有一个非常复杂的SQL服务器数据库，我试图在这里简化。我有5个表，我想从中提取信息。我想要Table_A的所有记录。其他表可能有也可能没有记录。当他们这样做时，我希望将这些信息添加到我的决赛桌。我无法获得查询以返回正确的值。我尝试了不同的连接等，但保持相同的值。

表-A ：

LotID     MaterialNumber        RejectReason   
1234      987                   16
2345      876   
3456      987
4567      876
5678      987
6789      987                   15
7890      987           
8901      987

表-B ：

LotID     Color  
1234      0.25
5678      0.28
6789      0.27
8901      0.3

Table_C ：

LotID     Gloss  
1234      1.25
2345      1.28
6789      1.27
8901      1.30

Table_D ：

LotID   Thickness  
2345    2.25
5678    2.28
6789    2.27
7890    2.3

Table_E ：

NR      Description
12      Tear
13      Run
14      Drip
15      Wet
16      Dry

Table_F ：

Material_Number Part_Descrip

987         Front
876         Rear

查询

Select
    Table_A.LotID, Table_A.MaterialNumber,
    Table_B.Color,
    Table_C.Gloss,
    Table_D.Thickness
    Table_E.Description,
    Table_F.Part_Descrip,
FROM 
    Table_A A
LEFT OUTER JOIN
    Table_B B ON A.LotID = B.LotID
LEFT OUTER JOIN
    Table_C C ON A.LotID = C.LotID
LEFT OUTER JOIN
    Table_D D ON A.LotID = D.LotID
LEFT OUTER JOIN
    Table_E E ON A.RejectReason = E.NR
LEFT OUTER JOIN
    Table_F F ON A.MaterialNumber = F.Material_Number
ORDER BY 
    A.LotID

返回：

LotID    Material Number    Color   Gloss   Thickness   Reject  Part Description
6789     987                0.27    1.28    2.27        Wet     Front

希望它返回：

LotID   Material Number Color   Gloss   Thickness   Reject  Part Description
1234    987             0.25    1.25    Null        Dry     Front
2345    876             Null    1.28    2.25        Null    Rear
3456    987             Null    Null    Null        Null    Front
4567    876             Null    Null    Null        Null    Rear
5678    987             0.28    1.28    2.28        Null    Front
6789    987             0.27    1.28    2.27        Wet     Front
7890    987             Null    Null    2.3         Null    Front
8901    987             0.3     1.3     Null        Null    Front

原始查询

SELECT
Z_LINE5_QU.CollectTime,
Z_LINE5_QU.LotID, 
Z_LINE5_QU.MOULD_ID, 
Z_LINE5_QU.CAV,
Z_LINE5_QU.MOULD_CAV,
Z_LINE5_QU.OK, 
Z_LINE5_QU.NOK, 
Z_LINE5_QU.OKAFTERREWORK, 
Z_LINE5_QU.NOKAFTERREWORK, 
Z_LINE5_QU.SENDTOREWORK, 
Z_LINE5_QU.SPOTCH_OK, 
Z_LINE5_QU.SPOTCH_NOK, 
Z_LINE5_QU.MOULD_CY, 
Z_LINE5_QU.LINE, 
Z_LINE5_QU.LINE_ID, 
Z_LINE5_QU.REASON_NR1, 
Z_CODE_QU_REASON.DESCR, 
Z_CODE_PART.PART_DESCR,
Z_LINE5_SPOTCH_GLOSS.GLOSS_MP1, 
Z_LINE5_SPOTCH_GLOSS.GLOSS_MP2, 
Z_LINE5_SPOTCH_THICK.THICK_Z1, 
Z_LINE5_SPOTCH_THICK.THICK_Z2, 
Z_LINE5_SPOTCH_THICK.THICK_Z3, 
Z_LINE5_SPOTCH_THICK.THICK_Z4, 
Z_LINE5_SPOTCH_THICK.THICK_Z5, 
Z_LINE5_SPOTCH_THICK.THICK_Z6, 
Z_LINE5_SPOTCH_THICK.THICK_Z7, 
Z_LINE5_SPOTCH_THICK.THICK_Z8, 
Z_LINE5_SPOTCH_THICK.THICK_Z9

FROM RTUSPRAY.DBO.Z_LINE5_QU Z_LINE5_QU

        LEFT OUTER JOIN RTUSPRAY.DBO.Z_LINE5_SPOTCH_COLOR
              ON Z_LINE5_QU.LOTID = Z_LINE5_SPOTCH_COLOR.LOTID

        LEFT OUTER JOIN RTUSPRAY.DBO.Z_LINE5_SPOTCH_THICK
              ON Z_LINE5_QU.LOTID=Z_LINE5_SPOTCH_THICK.LOTID

        LEFT OUTER JOIN RTUSPRAY.DBO.Z_LINE5_SPOTCH_GLOSS
              ON Z_LINE5_QU.LOTID=Z_LINE5_SPOTCH_GLOSS.LOTID

        LEFT OUTER JOIN RTUSPRAY.DBO.Z_CODE_QU_REASON
              ON Z_LINE5_QU.REASON_NR1=Z_CODE_QU_REASON.NR

        LEFT OUTER JOIN RTUSPRAY.DBO.Z_CODE_PART
              ON Z_LINE5_QU.CODE_SAP = Z_CODE_PART.CODE_SAP_PRESER

ORDER BY Z_LINE5_QU.LotID

Answer 1

我刚刚在我的数据库中重新创建它并且它工作正常。唯一的区别是我使用了选择列表中的表别名而不是原始问题中显示的实际表名：

 Select
A.LotID,
A.MaterialNumber,
B.Color,
C.Gloss,
D.Thickness,
E.Description,
F.Part_Descrip
FROM 
    dbo.Table_A as A
LEFT OUTER JOIN
    Table_B as B ON A.LotID = B.LotID
LEFT OUTER JOIN
    Table_C as C ON A.LotID = C.LotID
LEFT OUTER JOIN
    Table_D as D ON A.LotID = D.LotID
LEFT OUTER JOIN
    Table_E as E ON A.RejectReason = E.NR
LEFT OUTER JOIN
    Table_F as F ON A.MaterialNumber = F.Material_Number
ORDER BY 
    A.LotID

以下是我的结果：

    LotID   MaterialNumber  Color   Gloss   Thickness   Description Part_Descrip
    1234    987             0.000   1.25    NULL        Dry         Front
    2345    876             NULL    1.28    2.25        NULL        Rear
    3456    987             NULL    NULL    NULL        NULL        Front
    4567    876             NULL    NULL    NULL        NULL        Rear
    5678    987             0.280   NULL    2.28        NULL        Front
    6789    987             0.270   1.27    2.27        Wet         Front
    7890    987             NULL    NULL    2.3         NULL        Front
    8901    987             0.300   1.3     NULL        NULL        Front

Answer 2

好像你已经通过LotID加入了每个表。看起来他们共享的唯一LotID是6789，结果反映了这一点。我认为你想要做的是，因为它们都共享相同的唯一标识符，实际上只创建一个从A到D的表，每个表有两列以上。假设表E列NR对应于表A的第三列，那么您就想要一个连接。唯一的其他连接应该是表A，表F列MaterialNumber。这样你只需要两个连接。否则我相信你实际上需要一个组合（记住排列吗？）你在问题中的五个连接。

使用连接的5个表的SQL查询

2 个答案: