SqlServer里，一条sql进行递归删除
浏览数：110 /
时间：2015年06月12日
Server 2005中提供了公用表表达式（CTE），使用CTE，可以使SQL语句的可维护性，同时，CTE要比表变量的效率高得多。
存储过程方法：
1 create proc up_delete_nclass
2 @did int
3 as
4 with my1 as(select * from News_Class where id = @did
5 union all select News_Class.* from my1, News_Class where my1.id = News_Class.ParentID
6 )
7 delete from News_Class where exists (select id from my1 where my1.id = News_Class.id)
8 go
9
10 exec up_delete_nclass 16
2 @did int
3 as
4 with my1 as(select * from News_Class where id = @did
5 union all select News_Class.* from my1, News_Class where my1.id = News_Class.ParentID
6 )
7 delete from News_Class where exists (select id from my1 where my1.id = News_Class.id)
8 go
9
10 exec up_delete_nclass 16
非存储过程方法：
1 with my1 as(select * from aaa where id = 1
2 union all select aaa.* from my1, aaa where my1.id = aaa.pid
3 )
4 delete from aaa where exists (select id from my1 where my1.id = aaa.id)
2 union all select aaa.* from my1, aaa where my1.id = aaa.pid
3 )
4 delete from aaa where exists (select id from my1 where my1.id = aaa.id)
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