选择2个表之间的公共行和非公共行

Question

我有2个名称为kcc_201和Kcc_300的表。

表格kcc_201看起来像这样

ClientMarketCode | WorkDate   | OverDraft
123              | 2012-12-12 | 34.5
456              | 2012-12-12 | 60
98               | 2012-12-12 | 80

表格kcc_300看起来像这样

ClientMarketCode | WorkDate   | DebitAmount
123              | 2012-12-12 | 80
456              | 2012-12-12 | 90
966              | 2012-12-12 | 100
100              | 2012-12-12 | 787

我的问题是什么是查询，它使我的所有客户端行在2个表之间具有相同的ClientMarketCode和workdate匹配，并且在不使用union的情况下从2个表中检索不匹配的行

什么查询让我得到这样的结果：

clientMarketcode | WorkDate   | OverDraft | DebitAmount
123              | 2012-12-12 | 34.5      | 80
456              | 2012-12-12 | 60        | 90
98               | 2012-12-12 | 80        | null
966              | 2012-12-12 | null      | 100
100              | 2012-12-12 | null      | 787

Answer 1

您可以使用与此类似的FULL OUTER JOIN：

select 
    coalesce(k2.ClientMarketCode, k3.ClientMarketCode) ClientMarketCode,
    coalesce(k2.WorkDate, k3.WorkDate) WorkDate,
    k2.OverDraft,
    k3.DebitAmount
from kcc_201 k2
full outer join kcc_300 k3
  on k2.ClientMarketCode = k3.ClientMarketCode
  and k2.WorkDate = k3.WorkDate;

请参阅SQL Fiddle with Demo

结果是：

| CLIENTMARKETCODE |   WORKDATE | OVERDRAFT | DEBITAMOUNT |
------------------------------------------------------------
|              123 | 2012-12-12 |        34 |          80 |
|              456 | 2012-12-12 |        60 |          90 |
|               98 | 2012-12-12 |        80 |      (null) |
|              966 | 2012-12-12 |    (null) |         100 |
|              100 | 2012-12-12 |    (null) |         787 |

Answer 2

select 

isnull(kcc_201.clientMarketcode,kcc_300.clientMarketcode),
isnull(kcc_201.WorkDate,kcc_300.WorkDate),
kcc_201.OverDraft,
kcc_300.DebitAmount


from  kcc_201
FULL JOIN kcc_300 on kcc_201.clientMarketcode=kcc_300.clientMarketcode
                     and kcc_201.WorkDate=kcc_300.WorkDate

Answer 3

简单，使用FULL OUTER JOIN，

select nullif(k1.ClientMarketCode, k2.ClientMarketCode) as ClientMarketCode,
       nullif(k1.WorkDate, k2.WorkDate) as WorkDate,
       k1.OverDraft,
       k2.DebitAmount
from kcc_201 k1 full outer join kcc_300 k2 
on k1.ClientMarketCode = k2.ClientMarketCode
and k1.WorkDate = k2.WorkDate;