sql语句删除库中所有表

Posted 2020-10-21 zhengrui

 1 --/第1步**********删除所有表的外键约束*************************/
 2 use DCCalc_Engine
 3 GO
 4 DECLARE c1 cursor for
 5 select ‘alter table [‘+ object_name(parent_obj) + ‘] drop constraint [‘+name+‘]; ‘
 6 from sysobjects
 7 where xtype = ‘F‘
 8 open c1
 9 declare @c1 varchar(8000)
10 fetch next from c1 into @c1
11 while(@@fetch_status=0)
12 begin
13 exec(@c1)
14 fetch next from c1 into @c1
15 end
16 close c1
17 deallocate c1
18 
19 --/第2步**********删除所有表*************************/
20 
21 use DCCalc_Engine
22 GO
23 declare @sql varchar(8000)
24 while (select count(*) from sysobjects where type=‘U‘)>0
25 begin
26 SELECT @sql=‘drop table ‘ + name
27 FROM sysobjects
28 WHERE (type = ‘U‘)
29 ORDER BY ‘drop table ‘ + name
30 exec(@sql) 
31 end
32 --/第2步**********删除所有存储过程*************************/
33 use 数据库
34 declare @tname varchar(8000)
35 set @tname=‘‘
36 select @tname=@tname + Name + ‘,‘ from sysobjects where xtype=‘P‘
37 select @tname=‘drop Procedure ‘ + left(@tname,len(@tname)-1)
38 exec(@tname)