sqlserver多行转一行

http://topic.csdn.net/u/20120705/11/e3c6d860-a46c-475c-808e-859475e9ad45.html?r=79037815--> 测试数据：[test]if object_id('[test]') is not null drop table [test]create table [test]([Id] int,[班级] int,[老师] varchar(2),[任职日期] datetime)goinsert [test]select 1,1,'张','2012-01-02' union allselect 2,1,'李','2012-04-02' union allselect 3,1,'王','2012-05-02' union allselect 4,2,'刘','2012-02-02' union allselect 5,2,'赵','2012-05-02'godeclare @str varchar(2000)set @str=''select     @str=@str+',[教师'+LTRIM(px)+']=max(case when px='+LTRIM(px)    +' then [老师] else null end),[任职日期'    +LTRIM(px)+']=max(case when px='+LTRIM(px)+' then convert(varchar(10),任职日期,120) else null end)'from    (    select         px=ROW_NUMBER()over(partition by [班级] order by id),        *    from        test    )tgroup by    pxexec('select [班级]'+@str+' from(select         px=ROW_NUMBER()over(partition by [班级] order by id),        *    from        test)t group by [班级]')/*班级    教师1    任职日期1    教师2    任职日期2    教师3    任职日期31    张    2012-01-02    李    2012-04-02    王    2012-05-022    刘    2012-02-02    赵    2012-05-02    NULL    NULL*/