添加列要通过选择sql Server中另一个表中的所有项来选择Table。 我有这样的牵引表：
表1
ID || Title
1 || Ruler
2 || Book
3 || Pen
. || .
. || .
. || .
表2
itemID || Price || Date
1 || 200 || 2016-01-21
2 || 30 || 2017-03-01
3 || 27 || 2014-06-09
. || .
. || .
. || .
表格结果
Date || Ruler || Book || pen || … more
2016-01-21 || 200 || || ||
2017-03-01 || || 30 || ||
2014-06-09 || || || 27 ||
.
.
.
它不起作用
Declare @cols1 varchar(max)
Declare @query nvarchar(max)
Select @cols1 = stuff((select distinct ','+QuoteName([Title]) from table1 for xml path('')),1,1,'')
Set @Query = ' Select * from (
Select t2.[Date], t1.[Title], t2.Price from table2 t2 inner join table1 t1
on t2.ItemId = t1.Id ) a pivot (max([Price]) for [Title] in ( ' +@cols1 + ' ) ) p '
exec sp_executeSql @query
它返回Max Price，但我想要最后价格像这样：
pivot (Select ([Price]) from table2 order by Date desc for [Title] in ( ' +@cols1 + ' ) ) p '
语法错误返回！？
答案 0 :(得分：0)
您可以使用以下角色：
Select * from (
Select t2.[Date], t1.[Title], t2.Price from table2 t2 inner join table1 t1
on t2.ItemId = t1.Id ) a
pivot (max([Price]) for [Title] in ([Ruler],[Book],[Pen]) ) p
对于动态标题列表，您可以查询如下：
Declare @cols1 varchar(max)
Declare @query nvarchar(max)
Select @cols1 = stuff((select distinct ','+QuoteName([Title]) from table1 for xml path('')),1,1,'')
Set @Query = ' Select * from (
Select t2.[Date], t1.[Title], t2.Price from table2 t2 inner join table1 t1
on t2.ItemId = t1.Id ) a
pivot (max([Price]) for [Title] in ( ' +@cols1 + ' ) ) p '
exec sp_executeSql @query