如果由于外键约束删除table失败，则先删除所有约束：
--/第1步**********删除所有表的外键约束*************************/
DECLAREc1cursorfor
select'alter table ['+ object_name(parent_obj) +'] drop constraint ['+name+']; '
fromsysobjects
wherextype ='F'
openc1
declare@c1varchar(8000)
fetchnextfromc1into@c1
while(@@fetch_status=0)
begin
exec(@c1)
fetchnextfromc1into@c1
end
closec1
deallocatec1
--/第2步**********删除所有表*************************/
use 数据库名(是要删除表的所在的那个数据库的名称)
GO
declare@sqlvarchar(8000)
while (selectcount(*)fromsysobjectswheretype='U')>0
begin
SELECT@sql='drop table '+name
FROMsysobjects
WHERE(type ='U')
ORDERBY'drop table '+name
exec(@sql)
end
--删除所有的存储过程同理可得，但不需要走第一步，只需将第2步的代码的where type='U' 改成 where type='P'，drop table 改成 drop Procedure。
--/第1步**********删除所有表的外键约束*************************/ DECLARE c1 cursor for select 'alter table ['+ object_name(parent_obj) + '] drop constraint ['+name+']; ' from sysobjects where xtype = 'F' open c1
declare @c1 varchar(8000)
fetch next from c1 into @c1 while(@@fetch_status=0)
begin
exec(@c1)
fetch next from c1 into @c1
end
close c1
deallocate c1 --/第2步**********删除所有表*************************/ use izhanshi
GO
declare @sql varchar(8000) while (select count(*) from sysobjects where type='U')>0 begin
SELECT @sql='drop table ' + name
FROM sysobjects
WHERE (type = 'U')
ORDER BY 'drop table ' + name
exec(@sql)
end