Sql server SQL Server pivot查询只返回一行
我的数据如下:Sql server SQL Server pivot查询只返回一行,sql-server,pivot,Sql Server,Pivot,我的数据如下: ID ColumnName columnnvalue ----------------------------- 13 seraialnew tester name 13 serial 123123 13 seraialnew am444 13 serial 33333 SELECT id,seraialnew,serial FROM ( SELECT id,columnnvalue, ColumnName F
ID ColumnName columnnvalue
-----------------------------
13 seraialnew tester name
13 serial 123123
13 seraialnew am444
13 serial 33333
SELECT id,seraialnew,serial
FROM (
SELECT id,columnnvalue, ColumnName FROM dbo.formValues
) cols
PIVOT(
MAX(id)
FOR ColumnName IN(seraialnew,serial)
)p
如果您得到相同的
id
则只有一个字符串,因此我更改了其中两行的id:
;WITH formValues AS (
SELECT *
FROM (VALUES
(13,'seraialnew','tester name'),
(13,'serial','123123'),
(14,'seraialnew','am444'),
(14,'serial','33333')
) as t(ID, ColumnName, columnnvalue)
)
SELECT id,seraialnew,serial
FROM (
SELECT id,columnnvalue, ColumnName
FROM formValues
) cols
PIVOT(
MAX(columnnvalue)
FOR ColumnName IN(seraialnew,serial)
)p
将为您提供:
id seraialnew serial
13 tester name 123123
14 am444 33333
另一种方式:
SELECT *
FROM (
SELECT id,
columnnvalue,
ColumnName+CAST(ROW_NUMBER() OVER (PARTITION BY ColumnName ORDER BY ColumnName) as nvarchar(1)) as ColumnName
FROM formValues
) cols
PIVOT(
MAX(columnnvalue)
FOR ColumnName IN(seraialnew1,serial1,seraialnew2,serial2)
)p
使用相同的id=13
将为您提供以下信息:
id seraialnew1 serial1 seraialnew2 serial2
13 am444 33333 tester name 123123
ID都是一样的-
13
。这就是为什么会得到1行。您希望它返回什么?我想创建一个表的动态结果add列,并在neasted子表中添加值,然后使用此组合获得结果。当id向表中添加列时,此结果会在下表中添加记录为的新列