SQL 将一个字段内用逗号分隔的内容分成多条记录

CREATE TABLE [dbo].[testtb](

[namea] [varchar](100) NULL,

[desca] [varchar](50) NULL

) ON [PRIMARY]

insert into testtb values('A1,A2,','AAAAA')

insert into testtb values('A3,','BBBBBB')

insert into testtb values('A5,A8,A9,','AAACCAA')

insert into testtb values('A6,A20,','AAANNNNAA')

--select * from testtb 

--truncate table testtb

--定义一个临时表

WITH testtb2 AS (

SELECT namea,desca,CHARINDEX(',',namea) STA,CHARINDEX(',',namea)-1 LENS FROM testtb  

UNION ALL

SELECT namea,desca,CHARINDEX(',',namea,STA+1) STA,CHARINDEX(',',namea,STA+1)-STA-1 LENS FROM testtb2 WHERE STA<>0)

--SELECT * FROM testtb2

  

SELECT SUBSTRING(namea,STA-LENS,LENS) as [name],desca FROM testtb2

WHERE STA<>0

order by  SUBSTRING(namea,STA-LENS,LENS)