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近来发现数据库过大,空间不足,因此打算将数据库的数据进行全面的清理,但表非常多,一张一张的清空,实在麻烦,因此就想利用SQL语句一次清空所有数据.找到了三种方法进行清空.使用的数据库为MS SQL SERVER. 1.搜索出所有表名,构造为一条SQL语句 declare @trun_name varchar(8000) set @trun_name='' select @trun_name=@trun_name + 'truncate table ' + [name] + ' ' from sysobjects where xtype='U' and status > 0 exec (@trun_name)
declare @trun_name varchar(50) declare name_cursor cursor for select 'truncate table ' + name from sysobjects where xtype='U' and status > 0 open name_cursor fetch next from name_cursor into @trun_name while @@FETCH_STATUS = 0 begin exec (@trun_name) print 'truncated table ' + @trun_name fetch next from name_cursor into @trun_name end close name_cursor deallocate name_cursor
exec sp_msforeachtable "truncate table ?"
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