1、列转行
数据经过计算加工后会直接生成前端图表需要的数据源，但是程序里又需要把该数据经过列转行写入中间表中，下次再查询该数据时直接从中间表查询数据。
1.1 列换行语法
table_sourceUNPIVOT(value_columnFOR pivot_columnIN(<column_list>))
1.2 行转列案例
WITH TAS( SELECT 1 as TeamId,'测试团队1' as Team,80 'MEN',20 'WOMEN' UNION SELECT 2 as TeamId,'测试团队2' as Team,30 'MEN',70 'WOMEN' )---列转行------------------------------------SELECT TeamId,Team ,TYPE=ATTRIBUTE,CNT=VALUEFROM T UNPIVOT ( VALUE FOR ATTRIBUTE IN ([MEN],[WOMEN])) AS UPV
2、 行转列
行转列主要是从中间表里查询数据，SQL SERVER2005以下的版本则可以使用聚合函数来完成。
2.1 行转列语法
table_sourcePIVOT(聚合函数（value_column）FOR pivot_columnIN(<column_list>))
2.2、使用PIVOT实现
WITH TAS( SELECT 1 AS ID,'测试团队1' TEAM,'MEN' ITEM,80 CENT UNION SELECT 1 AS ID,'测试团队1' TEAM,'WOMEN' ITEM,20 CENT UNION SELECT 2 AS ID,'测试团队2' TEAM,'MEN' ITEM,30 CENT UNION SELECT 2 AS ID,'测试团队2' TEAM,'WOMEN' ITEM,70 CENT)SELECT * FROM T PIVOT (SUM(CENT) FOR ITEM IN ([MEN],[WOMEN])) A
2.3、使用聚合函数实现
WITH TAS( SELECT 1 AS ID,'测试团队1' TEAM,'MEN' ITEM,80 CENT UNION SELECT 1 AS ID,'测试团队1' TEAM,'WOMEN' ITEM,20 CENT UNION SELECT 2 AS ID,'测试团队2' TEAM,'MEN' ITEM,30 CENT UNION SELECT 2 AS ID,'测试团队2' TEAM,'WOMEN' ITEM,70 CENT)SELECT ID,TEAM,SUM(CASE WHEN ITEM='MEN' THEN CENT ELSE 0 END) 'MEN',SUM(CASE WHEN ITEM='WOMEN' THEN CENT ELSE 0 END) 'WOMEN' FROM TGROUP BY ID,TEAM
参考资料
http://www.cnblogs.com/zhangzt/archive/2010/07/29/1787825.html