Question

我有三张桌子：

TABLE1

D_ID    O_COUNT STATUS     P_ID   Q_ID
1          1    close      111    L_1
2          1    Resolved   111    L_1
3          1    close      111    L_1
4          0    open       111    L_1
5          0    new        111    L_1
6          1    close      111    L_1

TABLE2_DL

D_ID    D_LID   C_ID    E_ID    Q_ID    P_ID
  1        11      3      23     L_1    111
  2        12      3      24     L_1    111
  3        13      3      25     L_1    111
  4        14      3      26     L_1    111
  5        15      3      21     L_1    111

TABLE3_TED

EXEC_ID EXEC_STAT   TEAM     C_ID
24      FAILED      Pharma   3
28      FAILED      Pharma1  3
29      FAILED      Pharma   3
25      FAILED      Pharma   3
26      FAILED      Pharma1  3
27      FAILED      Pharma2  3

这是我编写的代码。

select D_ID, D_LID, E_ID,ted.EXEC_STAT,ted.TEAM,
DL.P_ID,DL.Q_ID,ted.C_ID,
(case 
when upper(ted.EXEC_STAT) like 'FAIL%' then 1
else 0
end) as FAILED,
(select O_COUNT from TABLE1 dd
where dd.D_ID = dl.D_ID 
and dd.P_ID=dl.P_ID
and dd.Q_ID=DL.Q_ID) OPENCOUNT,
(select Status from  TABLE1 dd
where dd.d_id = dl.d_id 
and dd.p_id=dl.p_id
and dd.q_id=DL.Q_ID) Status
from TABLE2_DL DL,TABLE3_TED ted
where DL.D_ID in (select d_id from TABLE1 dd
where dd.d_id = dl.d_id 
and dd.p_id=dl.p_id
and dd.q_id=DL.Q_ID
)

and  dl.E_ID = ted.EXEC_ID;

结果：

2   12  24  FAILED  Pharma  111 L_1 003 1   1   Resolved
3   13  25  FAILED  Pharma  111 L_1 003 1   1   close
4   14  26  FAILED  Pharma1 111 L_1 003 1   0   open

此查询为我提取记录。但我真正想要的是从TABLE3_TED获取的所有记录以及来自其他两个表的选定记录。我尝试首先加入table1和TABLE2_DL并将该查询别名，然后使用TABLE3_TED加入该查询，但我仍然没有从TABLE3_TED获取所有记录。请帮忙。

P.S。我是这个门户网站的新手，我不知道如何创建表格。也有人可以帮助我吗？提前致谢。：）

Answer 1

我可能会读错了，但听起来你正在寻找OUTER JOIN。尝试执行以下操作：

Select      DD.D_Id,
            DD.D_LId,
            DL.E_Id,
            TED.EXEC_STAT,
            TED.TEAM,
            DL.P_Id,
            DL.Q_Id,
            TED.C_Id,
            Case When Upper(TED.EXEC_STAT) Like 'FAIL%'
                Then 1
                Else 0
            End As FAILED,
            T1.O_COUNT As OPENCOUNT,
            T1.Status
From        Table3_TED  TED
Left Join   Table2_DL   DL  On  DL.E_Id = TED.EXEC_Id
Left Join   Table1      DD  On  DD.D_Id = DL.D_Id
                            And DD.P_Id = DL.P_Id
                            And DD.Q_Id = DL.Q_Id

我们如何加入三张桌子？

1 个答案: