SQL Server转换表透视

Question

我在SQL Server中有这个表：

Id Type   Value
---------------
100 up    109
100 up    44
101 down  51
101 down  77
102 left  88
103 right 99
103 right 12

我怎样才能把它变成这样？

Id   Up   Down   Left   Right
-------------------------------
100  109   N/A    N/A     N/A
100   44   N/A    N/A     N/A
101   N/A   51    N/A     N/A
101   N/A   77    N/A     N/A
102   N/A   N/A    88     N/A
103   N/A   N/A   N/A      99
103   N/A   N/A   N/A      12

Answer 1

您只需要一些Case语句：

select 
Case When Type = 'Up' Then Value Else 'N/A' END as Up
,Case When Type = 'Down' Then Value Else 'N/A' END as Down