sql行列转换PIVOT与unPIVOT

基本语法

select * from Mould pivot ( count(ID)for ProductTypeCode in ( [FC], [RCU], [RCD] )) as PVT;

with P
as ( select * from Mould )
select * from P pivot ( count(ID)for ProductTypeCode in ( [FC], [RCU], [RCD] )) as PVT;

一、sql行转列PIVOT：

二、sql列转行unPIVOT：

三、动态执行

　　先查询出要转为列的行数据，然后设置格式，再拼接字符串。

declare @strCN nvarchar(100);
select @strCN = isnull(@strCN + ',', '') + quotename(ProductTypeCode) from Mould group by ProductTypeCode;
declare @SqlStr nvarchar(1000);

set @SqlStr = N'
select * from Mould pivot ( count(ID)for ProductTypeCode in (' + @strCN + N') ) as PVT';
exec ( @SqlStr );
go