Question

我有两张桌子：

表A'真实订单'：

合同，
订单ID，
YYYYMM

表B'上传'：

合同，
订单ID，
YYYYMM

我想使用以下结构进行查询：

合约，YYYYMM，Nb of Real Orders，Nb of Uploads

如果知道表A中的某些合同没有出现在表B中，反之亦然，我怎样才能做到这一点？我使用的是SQL Server 2012。

Answer 1

让我知道这是否有效

select coalesce( a.contract,b.contract) as contract,  
       coalesce(a.YYYYMM,b.YYYYMM) as YYYYMM,
       count (a.order_id) as no_real_orders,
       count (b.order_id) as no_uploads 
from Table_a as a
full join Table_b as b
on a.contract = b.contract
   and a.YYYYMM = b.YYYYMM
group by coalesce(a.contract,b.contract), coalesce(a.YYYYMM,b.YYYYMM)

Answer 2

不幸的是，我对两个列的计数都相同。以下是输出的摘录：

Contract YYYYMM Nb Real Orders Nb Uploads
Contract_x  201701  17  17
Contract_x  201612  72  72
Contract_y  201702  196 196
Contract_y  201612  345 345
Contract_y  201701  264 264

代码是：

select coalesce(a.Contract_Code,b.Contract_Code) as Contract,
coalesce(a.OIA_Creation_Date_YYYYMM,b.Ordear_Creation_YYYYMM) as
YearMonth, count(a.OIA_Order_Number) as Nb_Real_Orders,
count(b.Order_Number) as Nb_Uploads from Raw_Data_A as a full join
Raw_Data_B as b on a.Contract_Code=b.Contract_Code and
a.OIA_Creation_Date_YYYYMM=b.Ordear_Creation_YYYYMM group by
 coalesce(a.Contract_Code,b.Contract_Code),coalesce(a.OIA_Creation_Date_YYYYMM,b.Ordear_Creation_YYYYMM)

Answer 3

我尝试将代码分成两个子查询，让我知道这是否有效..

select coalesce(a.contract,b.contract) as contract,  
       coalesce(a.YYYYMM,b.YYYYMM) as YYYYMM,
       no_real_orders,
       no_uploads 
from 
(
select contract,YYYYMM, count (order_id) as no_real_orders,
from Table_a 
group by contract, YYYYMM
) as a
full join
(
select contract,YYYYMM, count (order_id) as no_uploads,
from Table_b
group by contract, YYYYMM 
) as b
on a.contract = b.contract
and a.YYYYMM = b.YYYYMM

从两个表执行并集和计数

3 个答案: