sybase高效地删除大数据量记录

 

create procedure sp_delete_records
    @ld_day numeric(10) = -30      
as        
declare       
    @max_time datetime
	
	set  rowcount 1000
	  
	select @max_time = dateadd(dd,@ld_day,convert(datetime,convert(varchar,getdate(),111)))
	
	select 1
	while(@@rowcount>0)           
	  begin           
		  dump tran YOUR_DATABASE with truncate_only           
		  delete from YOUR_TABLE where lasttime < @max_time             
	  end
	
	set  rowcount 0
return

 

以上为存储过程

原理：使用循环，每次删除最多1000条记录，然后清除log，直到所有记录都删除