同事遇到一个问题，怎么实现行转列，参考了别人的示例，我是这样解决的。
创建数据源：
1 create table #temp ( 2 objectid int, 3 sitename nvarchar(32), 4 cities nvarchar(32), 5 projectdurationno nvarchar(32), 6 fullname nvarchar(32), 7 createdate datetime, 8 nodename nvarchar(32) 9 ) 10 11 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(2,'1','海口市','','','10 30 2015 10:26AM','开始') 12 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(2,'1','海口市','','','10 30 2015 10:26AM','规划库') 13 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(2,'1','海口市','','','10 30 2015 10:27AM','投资') 14 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(2,'1','海口市','','','10 30 2015 4:37PM','站点') 15 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(2,'1','海口市','','','10 30 2015 4:37PM','方案') 16 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(2,'1','海口市','','','10 30 2015 4:38PM','集成') 17 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(4,'1','海口市','','','10 30 2015 6:03PM','开始') 18 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(4,'1','海口市','','','10 30 2015 6:03PM','规划库') 19 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(4,'1','海口市','','','10 30 2015 6:03PM','投资') 20 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(4,'1','海口市','','','10 30 2015 9:31PM','站点') 21 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(4,'1','海口市','','','10 30 2015 9:31PM','方案') 22 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(4,'1','海口市','','','10 30 2015 9:32PM','集成') 23 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(4,'1','海口市','','','10 30 2015 9:32PM','光缆厂家') 24 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:13PM','开始') 25 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:13PM','规划库') 26 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:13PM','投资') 27 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:14PM','站点') 28 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:14PM','方案') 29 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:18PM','集成') 30 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:18PM','光缆厂家') 31 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:19PM','分布系统、设备安装') 32 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:19PM','光缆到位') 33 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:24PM','PTN上线') 34 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:25PM','开通') 35 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(6,'1','海口市','','','11 3 2015 3:26PM','结束') 36 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(8,'1','海口市','','','11 3 2015 3:45PM','开始') 37 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(8,'1','海口市','','','11 3 2015 3:45PM','规划库') 38 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(8,'1','海口市','','','11 3 2015 3:45PM','投资') 39 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(8,'1','海口市','','','11 3 2015 3:46PM','站点') 40 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(8,'1','海口市','','','11 3 2015 3:46PM','方案') 41 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(9,'1','海口市','','','11 3 2015 4:26PM','开始') 42 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(9,'1','海口市','','','11 3 2015 4:26PM','规划库') 43 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(9,'1','海口市','','','11 3 2015 4:26PM','投资') 44 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(10,'1','海口市','','','11 3 2015 4:29PM','开始') 45 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(10,'1','海口市','','','11 3 2015 4:29PM','规划库') 46 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(10,'1','海口市','','','11 3 2015 4:29PM','投资') 47 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:33PM','开始') 48 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:33PM','规划库') 49 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:33PM','投资') 50 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:33PM','站点') 51 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:41PM','方案') 52 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:42PM','集成') 53 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:42PM','光缆厂家') 54 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:42PM','分布系统、设备安装') 55 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:43PM','光缆到位') 56 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:44PM','PTN上线') 57 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:44PM','开通') 58 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(11,'1','海口市','','','11 3 2015 4:46PM','结束') 59 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(7,'2','海口市','','','11 3 2015 3:30PM','开始') 60 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(7,'2','海口市','','','11 3 2015 3:30PM','规划库') 61 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(7,'2','海口市','','','11 3 2015 3:30PM','投资') 62 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(7,'2','海口市','','','11 3 2015 3:31PM','站点') 63 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(7,'2','海口市','','','11 3 2015 3:31PM','方案') 64 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(7,'2','海口市','','','11 3 2015 3:32PM','集成') 65 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(7,'2','海口市','','','11 3 2015 3:32PM','光缆厂家') 66 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(5,'2','海口市','','','11 3 2015 10:31AM','开始') 67 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(5,'2','海口市','','','11 3 2015 10:31AM','规划库') 68 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(5,'2','海口市','','','11 3 2015 10:34AM','投资') 69 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(3,'7','海口市','','','10 30 2015 5:36PM','开始') 70 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(3,'7','海口市','','','10 30 2015 5:36PM','规划库') 71 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(3,'7','海口市','','','10 30 2015 5:36PM','投资') 72 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(3,'7','海口市','','','10 30 2015 5:37PM','站点') 73 insert into #temp(objectid,sitename,cities,projectdurationno,fullname,createdate,node_name)values(3,'7','海口市','','','10 30 2015 5:37PM','方案')
方案一、使用pivot进行行转列：
1 select objectid,SiteName,[开始],[规划库],[投资],[站点],[方案],[集成] 2 from( 3 select objectid,sitename,NODE_NAME,createdate from #temp 4 ) as t10 5 pivot( 6 max(createdate) 7 for node_name in 8 ([开始],[规划库],[投资],[站点],[方案],[集成]) 9 ) as t11 10 order by sitename,objectid
方案二、group by 方案
1 2 select t10.sitename,t10.objectid, 3 (case t10.node_name when '开始' then t10.createdate else null end) as '开始', 4 (case t10.node_name when '规划库' then t10.createdate else null end) as '规划库', 5 (case t10.node_name when '投资' then t10.createdate else null end) as '投资', 6 (case t10.node_name when '站点' then t10.createdate else null end) as '站点', 7 (case t10.node_name when '方案' then t10.createdate else null end) as '方案', 8 (case t10.node_name when '集成' then t10.createdate else null end) as '集成' 9 into #temp10 10 from #temp as t10 11 12 select * from #temp10 13 14 select objectid,sitename, 15 max([开始]) as [开始], 16 max([规划库]) as [规划库], 17 max([投资]) as [投资], 18 max([站点]) as [站点], 19 max([方案]) as [方案], 20 max([集成]) as [集成] 21 into #temp12 22 from #temp10 23 group by objectid,sitename
对比之后两种方案结果一致。
执行效果：
2 1 2015-10-30 10:26:59.663 2015-10-30 10:26:59.683 2015-10-30 10:27:32.013 2015-10-30 16:37:14.153 2015-10-30 16:37:31.387 2015-10-30 16:38:51.797
4 1 2015-10-30 18:03:09.720 2015-10-30 18:03:09.737 2015-10-30 18:03:32.650 2015-10-30 21:31:11.683 2015-10-30 21:31:47.820 2015-10-30 21:32:28.450
6 1 2015-11-03 15:13:16.393 2015-11-03 15:13:16.410 2015-11-03 15:13:40.603 2015-11-03 15:14:30.073 2015-11-03 15:14:50.243 2015-11-03 15:18:15.117
8 1 2015-11-03 15:45:21.577 2015-11-03 15:45:21.593 2015-11-03 15:45:39.000 2015-11-03 15:46:08.953 2015-11-03 15:46:22.547 NULL
9 1 2015-11-03 16:26:01.500 2015-11-03 16:26:01.520 2015-11-03 16:26:22.587 NULL NULL NULL
10 1 2015-11-03 16:29:10.687 2015-11-03 16:29:10.697 2015-11-03 16:29:28.677 NULL NULL NULL
11 1 2015-11-03 16:33:02.083 2015-11-03 16:33:02.107 2015-11-03 16:33:23.270 2015-11-03 16:33:59.510 2015-11-03 16:41:48.663 2015-11-03 16:42:14.450
5 2 2015-11-03 10:31:13.560 2015-11-03 10:31:13.580 2015-11-03 10:34:41.880 NULL NULL NULL
7 2 2015-11-03 15:30:07.367 2015-11-03 15:30:07.377 2015-11-03 15:30:31.943 2015-11-03 15:31:29.560 2015-11-03 15:31:45.950 2015-11-03 15:32:08.257
3 7 2015-10-30 17:36:29.193 2015-10-30 17:36:29.237 2015-10-30 17:36:54.887 2015-10-30 17:37:24.507 2015-10-30 17:37:47.057 NULL