数据库字段拆分成多条数据记录

--分拆处理示例

create table table1(文章ID int,文章标题 varchar(10),作者 varchar(100),字数 int)

insert table1 select 101, '文章标题1 ', '作者a,作者b ' ,120

union all select 222, '文章标题2 ', '作者x,作者y,作者z ',300

union all select 343, '文章标题3 ', '作者m,作者n ' ,420

go

--分拆处理

declare @i int

select @i=max(len(作者)) from table1

set rowcount @i

select id=identity(int) into #t from syscolumns a,syscolumns b

set rowcount 0

select a.文章ID,a.文章标题

,作者=substring(a.作者,b.id,charindex( ',',a.作者+ ',',b.id)-b.id)

,字数=a.字数/(len(a.作者)-len(replace(a.作者, ',', ''))+1)

from table1 a,#t b

where b.id <=len(a.作者) and substring( ','+a.作者,b.id,1)= ','

go

--删除测试

drop table table1,#t

with temp as

(select tid,[examitem]=cast(left([examitem],charindex('◆',[examitem]+'◆')-1) as nvarchar(100)),Split=cast(stuff([examitem]+'◆',1,charindex('◆',[examitem]+'◆'),'') as nvarchar(100)) from exam

union all

select tid,[examitem]=cast(left(Split,charindex('◆',Split)-1) as nvarchar(100)),Split= cast(stuff(Split,1,charindex('◆',Split),'') as nvarchar(100)) from temp where split>''

)

select tid,[examitem] from temp order by tid