摘要： --树形数据查询示例--作者: 邹建 if exists (select * from dbo.sysobjects where id = object_id(N'[tb]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)drop table [tb]GO --示例数据create table [tb]([id] int identity(1,1),[pi... 阅读全文