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感兴趣的小伙伴，下面一起跟随编程之家 52php.cn的小编两巴掌来看看吧！ 解决方法就是在order by ID desc再加一个排序的字段，这样子可能会把速度提高很多。再加止排序的字段因查询而异了
如表
代码如下:
CREATE TABLE [dbo].[CMPP_SendCentre] (
[id] [int] IDENTITY (1,1) NOT NULL,[SendType] [varchar] (10) COLLATE Chinese_PRC_CI_AS NOT NULL,[SendDate] [datetime] NOT NULL,[Port] [varchar] (50) COLLATE Chinese_PRC_CI_AS NOT NULL,[Service_ID] [varchar] (20) COLLATE Chinese_PRC_CI_AS NOT NULL,[FeeType] [varchar] (2) COLLATE Chinese_PRC_CI_AS NOT NULL,[FeeCode] [varchar] (6) COLLATE Chinese_PRC_CI_AS NOT NULL,[Msg_Content] [varchar] (1024) COLLATE Chinese_PRC_CI_AS NOT NULL,[SendCount] [int] NOT NULL,[SucceedCount] [int] NOT NULL
) ON [PRIMARY]
GO
CREATE TABLE [dbo].[CMPP_SendCentreMo] (
[id] [int] IDENTITY (1,[SendCentreID] [int] NOT NULL,[Mo] [varchar] (20) COLLATE Chinese_PRC_CI_AS NOT NULL,[Stat] [varchar] (10) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO
CMPP_SendCentreMo.SendCentreID 与CMPP_SendCentre.ID成外建关系
于是建了一个视图
代码如下:
CREATE VIEW dbo.ViewCMPP_SendCentreMo
AS
SELECT
dbo.CMPP_SendCentreMo.id,dbo.CMPP_SendCentreMo.SendCentreID,dbo.CMPP_SendCentreMo.Mo,dbo.CMPP_SendCentreMo.Stat,dbo.CMPP_SendCentre.SendType,dbo.CMPP_SendCentre.SendDate,dbo.CMPP_SendCentre.Port,dbo.CMPP_SendCentre.Service_ID,case dbo.CMPP_SendCentre.FeeType when '01' then '免费' when '02' then '点播' else '包月' end as FeeType,cast(dbo.CMPP_SendCentre.FeeCode as smallint) as FeeCode,dbo.CMPP_SendCentre.Msg_Content
FROM dbo.CMPP_SendCentre INNER JOIN
dbo.CMPP_SendCentreMo ON
dbo.CMPP_SendCentre.id = dbo.CMPP_SendCentreMo.SendCentreID
一开始的查询语句为
代码如下:
select top 6*from [ViewCMPP_SendCentreMo]
where SendType = '扣费'
order by id desc
发现非常的慢
经过了解,原因是order by id desc/asc的查询是一行一行的找数据,所以非常的慢
于是改成了
代码如下:
select top 6*from [ViewCMPP_SendCentreMo]
where SendType = '扣费'
order by SendCentreID desc,id desc
查询就非常的快了 （编辑：李大同）
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