sql 删除数据库所有用户表

--变量@tablename保存表名
declare @tablename nvarchar()
--将用户表全部保存到临时表#tablename中
SELECT [name] into #tablename FROM sysobjects
WHERE type = 'U';
--当#tablename有数据时
while(select count() from #tablename)>
begin
--从#tablename中取第一条
select top  @tablename=[name] from #tablename;
--进行表删除操作,表名为变量,所以此处用到动态sql
exec('drop table '+@tablename);
--将此表名记录从#tablename中删除
delete from #tablename where [name]=@tablename;
end