[英]SQL 2008 Combining data from multiple rows with the same ID into one row
I have data in one table that contains several rows of data for the same CardNum. 我在一个表中有数据,其中包含同一CardNum的多行数据。 I would like to create a table where all the data for the same CardNum is displayed on the same row. 我想创建一个表,其中同一CardNum的所有数据显示在同一行上。
My data is currently like this: 我的数据目前是这样的:
PartID | CardNumber | RdrGrpID | TZID
0 412 31 1
0 412 34 1
0 567 38 1
0 567 33 5
0 567 71 3
This is how I would like the data to be: 这就是我想要的数据:
PartID | CardNumber | RdrGrpID_1 | TZID_1 | RdrGrpID_2 | TZID_2 | RdrGrpID_3 | TZID_3
0 412 31 1 34 1
0 567 38 1 33 5 71 3
Thank you in advance. 先感谢您。
To get this result, there are several ways that you can formulate the query. 要获得此结果,您可以通过多种方式来制定查询。
If you have a limited number of values for each partId
and cardNumber
, then you can use row_number()
with an aggregate function/CASE combination: 如果每个partId
和cardNumber
的值都有限,那么可以将row_number()
与聚合函数/ CASE组合一起使用:
select partid, cardnumber,
max(case when rn = 1 then rdrgrpid end) rdrgrpid_1,
max(case when rn = 1 then TZID end) TZID_1,
max(case when rn = 2 then rdrgrpid end) rdrgrpid_2,
max(case when rn = 2 then TZID end) TZID_2,
max(case when rn = 3 then rdrgrpid end) rdrgrpid_3,
max(case when rn = 3 then TZID end) TZID_3
from
(
select partId, cardNumber, RdrGrpID, TZID
, row_number() over(partition by partiD, cardnumber
order by rdrgrpid) rn
from yt
) d
group by partid, cardnumber;
See SQL Fiddle with Demo 请参阅SQL Fiddle with Demo
You could also use the PIVOT/UNPIVOT function to get the result: 您还可以使用PIVOT / UNPIVOT函数来获得结果:
select *
from
(
select partid, cardnumber,
col+'_'+cast(rn as varchar(10)) col,
val
from
(
select partId, cardNumber, RdrGrpID, TZID
, row_number() over(partition by partiD, cardnumber
order by rdrgrpid) rn
from yt
) d
unpivot
(
val
for col in (rdrgrpid, tzid)
) un
) s
pivot
(
max(val)
for col in (RdrGrpID_1, TZID_1, RdrGrpID_2, TZID_2,
RdrGrpID_3, TZID_3)
) piv
See SQL Fiddle with Demo . 请参阅SQL Fiddle with Demo 。
Now if you have an unknown number of values, then you will need to use dynamic sql: 现在,如果您有未知数量的值,那么您将需要使用动态sql:
DECLARE @colsPivot AS NVARCHAR(MAX),
@query AS NVARCHAR(MAX)
select @colsPivot = STUFF((SELECT ',' + QUOTENAME(c.col + '_'+cast(rn as varchar(10)))
from
(
select row_number() over(partition by partiD, cardnumber
order by rdrgrpid) rn
from yt
) t
cross apply
(
select 'RdrGrpID' col, 1 so union all
select 'TZID', 2
) c
group by col, rn, so
order by rn, so
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set @query
= 'select partid, cardnumber, '+@colsPivot+'
from
(
select partid, cardnumber,
col+''_''+cast(rn as varchar(10)) col,
val
from
(
select partId, cardNumber, RdrGrpID, TZID
, row_number() over(partition by partiD, cardnumber
order by rdrgrpid) rn
from yt
) d
unpivot
(
val
for col in (rdrgrpid, tzid)
) un
) s
pivot
(
max(val)
for col in ('+ @colspivot +')
) p'
exec(@query);
See SQL Fiddle with Demo . 请参阅SQL Fiddle with Demo 。 All versions gives the result: 所有版本都给出了结果:
| PARTID | CARDNUMBER | RDRGRPID_1 | TZID_1 | RDRGRPID_2 | TZID_2 | RDRGRPID_3 | TZID_3 |
-----------------------------------------------------------------------------------------
| 0 | 412 | 31 | 1 | 34 | 1 | (null) | (null) |
| 0 | 567 | 33 | 5 | 38 | 1 | 71 | 3 |
I would use PIVOT. 我会用PIVOT。 Here is an example for the first Id. 以下是第一个Id的示例。 I would do the same with the second Id and then join the tables. 我会对第二个Id做同样的事情,然后加入表格。
SELECT PartID, CardNumber, [1], [2],[3]
FROM
(SELECT PartID, CardNumber, RdrGrpID,
rank() over (partition by CardNumber order by RdrGrpID) r
FROM [dbo].[Table_1]) AS SourceTable
PIVOT
(
MIN([RdrGrpID])
FOR r IN ([1], [2],[3])
) AS PivotTable;
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