表中主鍵必須為標(biāo)識(shí)列,[ID] int IDENTITY (1,1)
1.分頁(yè)方案一:(利用Not In和SELECT TOP分頁(yè))
語(yǔ)句形式:
SELECT TOP 10 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 20 id
FROM TestTable
ORDER BY id))
ORDER BY ID
SELECT TOP 頁(yè)大小 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 頁(yè)大小*頁(yè)數(shù) id
FROM 表
ORDER BY id))
ORDER BY ID
2.分頁(yè)方案二:(利用ID大于多少和SELECT TOP分頁(yè))
語(yǔ)句形式:
SELECT TOP 10 *
FROM TestTable
WHERE (ID >
(SELECT MAX(id)
FROM (SELECT TOP 20 id
FROM TestTable
ORDER BY id) AS T))
ORDER BY ID
SELECT TOP 頁(yè)大小 *
FROM TestTable
WHERE (ID >
(SELECT MAX(id)
FROM (SELECT TOP 頁(yè)大小*頁(yè)數(shù) id
FROM 表
ORDER BY id) AS T))
ORDER BY ID
3.分頁(yè)方案三:(利用寧波減肥網(wǎng)站SQL的游標(biāo)存儲(chǔ)過(guò)程分頁(yè))
create procedure SqlPager
@sqlstr nvarchar(4000), --查詢字符串
@currentpage int, --第N頁(yè)
@pagesize int --每頁(yè)行數(shù)
as
set nocount on
declare @P1 int, --P1是游標(biāo)的id
@rowcount int
exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1, @rowcount=@rowcount output
select ceiling(1.0*@rowcount/@pagesize) as 總頁(yè)數(shù)--,@rowcount as 總行數(shù),@currentpage as 當(dāng)前頁(yè)
set @currentpage=(@currentpage-1)*@pagesize+1
exec sp_cursorfetch @P1,16,@currentpage,@pagesize
exec sp_cursorclose @P1
set nocount off
其它的方案:假如沒(méi)有主鍵,可以用臨時(shí)表,也可以用方案三做,但是效率會(huì)低。
建議排名推廣的時(shí)候,加上主鍵和索引,查詢效率會(huì)進(jìn)步。
通過(guò)SQL 查詢分析器,顯示比較:我的結(jié)論是:
分頁(yè)方案二:(利用ID大于多少和SELECT TOP分頁(yè))效率最高,需要拼接SQL語(yǔ)句
分頁(yè)方案一:(利用Not In和SELECT TOP分頁(yè)) 效率次之,需要拼接SQL語(yǔ)句
分頁(yè)方案三:(利用SQL的游標(biāo)存儲(chǔ)過(guò)程分頁(yè)) 效率最差,但是最為通用