谁帮我解释下这个存储过程什么意思啊 ALTER proc [dbo].[up_getFactorsBySid] @sid bigint as select f.*,d.*,k.* from Sys_Factor as f inner join Sys_Device as d on f.Fid = d.Fid inner join Sys_Kind as k on f.Kid = k.Kid where d.Sid = @sid and d.Dshow <> 0 order by d.Dorder ;