SQL Server 2008 R2——使用FOR XML PATH实现多条信息按指定格式在一行显示

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本文链接：http://www.cnblogs.com/wlsandwho/p/5039358.html

耻辱墙：http://www.cnblogs.com/wlsandwho/p/4206472.html

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直接上问题

首先，事主的提问风格我还是很喜欢的，一目了然。

但是，就实际问题来讲，是不是2条就4列？如果有100条，岂不是爆炸了？

所以，实际上事主应该是想要一个水平显示的效果，而不是一定要有很多列。

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不用说我是不是瞎猜的，我就是瞎猜的。哈哈哈。

上代码。

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 --by wls 20151211
 --网络代码有风险
 --复制粘贴须谨慎
 USE tempdb
 GO

 IF OBJECT_ID (N't_TestbyWLS', N'U') IS NOT NULL
 DROP TABLE t_TestbyWLS;
 GO

 CREATE TABLE t_TestbyWLS(Author NVARCHAR(9),Caption NVARCHAR(50),ReadCount INTEGER)
 GO

 INSERT INTO t_TestbyWLS VALUES('WLS','Hello1',100)
 INSERT INTO t_TestbyWLS VALUES('WLS','Hello2',100)
 INSERT INTO t_TestbyWLS VALUES('thbytwo','Hello2',200)
 INSERT INTO t_TestbyWLS VALUES('thbytwo','Hello1',220)
 INSERT INTO t_TestbyWLS VALUES('wlsandwho','Hello1',220)
 GO

 SELECT * FROM t_TestbyWLS
 GO

 WITH TempCRC
 AS
 (
 SELECT Author,caption+' '+CAST(readcount AS NVARCHAR(20)) AS CRC FROM t_TestbyWLS
 )
 ,TempXML
 AS
 (
 SELECT Author,(SELECT CRC+',' FROM TempCRC a WHERE a.author=b.author FOR XML PATH('') ) AS CRCXML FROM TempCRC B GROUP BY author
 )
 SELECT author,LEFT(crcxml,LEN(crcxml)-1) AS NewCRCXML FROM TempXML
 GO

运行结果。

执行计划。

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千万不要吐槽我的第二个CTE，那是没办法的事情。写了这么多SQL典型例子，大家见我哪次用子查询了？真是迫不得已。

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