(转)SqlServer2005高效分页sql查询语句汇总
sqlserver2005不支持关键字limit ,所以它的分页sql 查询 语句 将不能用mysql的方式进行,幸好sqlserver2005提供了top,rownumber等关键字,这样就能通过这几个关键字实现分页。 下面是本人在网上查阅到的几种 查询 脚本的写法: 几种sqlserver2005 高效 分
sqlserver2005不支持关键字limit ,所以它的分页sql查询语句将不能用mysql的方式进行,幸好sqlserver2005提供了top,rownumber等关键字,这样就能通过这几个关键字实现分页。
下面是本人在网上查阅到的几种查询脚本的写法:
几种sqlserver2005高效分页sql查询语句
top方案:
???sql code
select top 10 * from table1
???where id not in(select top 开始的位置 id from table1)
max:
????sql code
select top 10 * from table1
????where id>(select max(id)
????from (select top 开始位置 id from table1order by id)tt)
row:
? ? sql code
select *
from (
????select row_number()over(order by tempcolumn)temprownumber,*
????from (select top 开始位置+10 tempcolumn=0,* from table1)t
)tt
where temprownumber>开始位置
3种分页方式,分别是max方案,top方案,row方案
效率:
第1:row
第2:max
第3:top
缺点:
max:必须用户编写复杂sql,不支持非唯一列排序
top:必须用户编写复杂sql,不支持复合主键
row:不支持sqlserver2000
测试数据:
共320万条数据,每页显示10条数据,分别测试了2万页、15万页和32万页。
页码,top方案,max方案,row方案
2万,60ms,46ms,33ms
15万,453ms,343ms,310ms
32万,953ms,720ms,686ms
是一种通过程序拼接sql语句的分页方案,
用户提过的sql语句不需要编写复杂的sql逻辑
诺用户提供sql如下
sql code
select * from table1
?
从第5条开始,查询5条,处理后sql变为
sql code
select *
from (
????select row_number()over(order by tempcolumn)temprownumber,*
????from (select top 10 tempcolumn=0,* from table1)t
)tt
where temprownumber>5
?
这是什么意思呢?分解一下
首先将用户输入的sql语句转稍稍修改
在select后添加top 开始位置+条数变成
再外加一列tempcolum,变成这样
sql code
select top 20 tempcolumn=0,* from clazz
嵌套一层,这样便可查询出行号
???刚才那个列就是用来这里order by用的
(也不知道sqlserver的row_number函数为什么必须要order by)
sql code
select row_number()over(order by tempcolumn)temprownumber,*
from (修改过的查询)t
再套一层,过滤掉行号小于开始位置的行
sql code
select * from (第二层)tt
where temprownumber>10

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