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我有一个存储两个值的表；每个客户的“总计”和“欠”。使用两个文件将数据上传到表中，一个带入“total”，另一个带入“owing”。这意味着我对每个 customerID 有两条记录：

customerID:--------Total:--------- Owing:

1234----------------  1000----------NULL

1234-----------------NULL-----------200

我想编写一个将两条记录合并在一起的存储过程：

customerID:--------Total:--------- Owing:

1234----------------  1000----------200

我见过使用 COALESCE 的例子，所以把这样的东西放在一起：

BEGIN

-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;

--Variable declarations

DECLARE @customer_id varchar(20)
DECLARE @total decimal(15,8)
DECLARE @owing decimal(15,8)
DECLARE @customer_name_date varchar(255)
DECLARE @organisation varchar(4)
DECLARE @country_code varchar(2)
DECLARE @created_date datetime

--Other Variables
DECLARE @totals_staging_id int

--Get the id of the first row in the staging table
SELECT @totals_staging_id = MIN(totals_staging_id)
from TOTALS_STAGING

--iterate through the staging table
WHILE @totals_staging_id is not null
BEGIN

update TOTALS_STAGING

SET 
total = coalesce(@total, total),
owing = coalesce(@owing, owing)

where totals_staging_id = @totals_staging_id

END
END

有任何想法吗？

4

4 回答 4

1 
SELECT t1.customerId, t1.total, t2.owing FROM test t1 JOIN test t2 ON ( t1.customerId = t2.customerId) WHERE t1.total IS NOT NULL AND t2.owing IS NOT NULL

想知道为什么不只是UPDATE在第二个文件执行上使用？

于 2013-02-20T12:15:45.827 回答
0

This should work:

SELECT CustomerID, 
       COALESCE(total1, total2) AS Total, 
       COALESCE(owing1, owing2) AS Owing
FROM 
(SELECT row1.CustomerID AS CustomerID,
        row1.Total AS total1,
        row2.Total AS total2,
        row1.Owing AS owing1,
        row2.Owing AS owing2
FROM YourTable row1 INNER JOIN YourTable row2 ON row1.CustomerID = row2.CustomerID
WHERE row1.Total IS NULL AND row2.Total IS NOT NULL) temp
--Note:  Alter the WHERE clause as necessary to ensure row1 and row2 are unique.

...but note that you'll need some mechanism to ensure row1 and row2 are unique. My WHERE clause is an example based on the data you provided. You'll need to tweak this to add something more specific to your business rules.

于 2013-07-20T22:04:49.933 回答
0

除了 COUNT，聚合函数忽略空值。聚合函数经常与 SELECT 语句的 GROUP BY 子句一起使用。MSDN

因此，您无需担心求和的空值。下面将把你的 合并记录放在一起。小提琴演示

select customerId,
       sum(Total) Total,
       sum(Owing) Owing
from T
Group by customerId
于 2013-02-20T10:37:24.007 回答
0

尝试这个 ：

CREATE TABLE #Temp
(
  CustomerId int,
  Total int,
  Owing int
)

insert into #Temp
values (1024,100,null),(1024,null,200),(1025,10,null)



Create Table #Final 
(
  CustomerId int,
  Total int,
  Owing int
)

insert into #Final
values (1025,100,50)



MERGE #Final AS F
USING 
(SELECT customerid,sum(Total) Total,sum(owing) owing FROM #Temp
 group by #Temp.customerid
) AS a

ON (F.customerid = a.customerid)
WHEN MATCHED THEN UPDATE SET F.Total = F.Total + isnull(a.Total,0)
                              ,F.Owing = F.Owing + isnull(a.Owing,0)
WHEN NOT MATCHED THEN
INSERT (CustomerId,Total,Owing)
VALUES (a.customerid,a.Total,a.owing);

select * from #Final

drop table #Temp
drop table #Final
于 2013-02-20T11:04:09.553 回答