摘要： this article post on CSDN Community.Learning......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),[pid] int,name varchar(20))insert [tb] select 0,'中国&# 阅读全文