SQL Server 存储过程的经典分页
建立表:
Create TABLE [TestTable] (
[ID] [int] IDENTITY (1, 1) NOT NULL ,
[FirstName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL ,
[LastName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL ,
[Country] [nvarchar] (50) COLLATE Chinese_PRC_CI_AS NULL ,
[Note] [nvarchar] (2000) COLLATE Chinese_PRC_CI_AS NULL
) ON [PRIMARY]
GO
插入数据:(2万条,用更多的数据测试会明显一些)
SET IDENTITY_Insert TestTable ON
declare @i int
set @i=1
while @i<=20000
begin
insert into TestTable([id], FirstName, LastName, Country,Note) values(@i, ”FirstName_XXX”,”LastName_XXX”,”Country_XXX”,”Note_XXX”)
set @i=@i+1
end
SET IDENTITY_Insert TestTable OFF
————————————-
分页方案一:(利用Not In和Select TOP分页)
语句形式:
Select TOP 10 *
FROM TestTable
Where (ID NOT IN
(Select TOP 20 id
FROM TestTable
orDER BY id))
orDER BY ID
Select TOP 页大小 *
FROM TestTable
Where (ID NOT IN
(Select TOP 页大小*页数 id
FROM 表
orDER BY id))
orDER BY ID
————————————-
分页方案二:(利用ID大于多少和Select TOP分页)
语句形式:
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 页大小 *
FROM TestTable
Where (ID >
(Select MAX(id)
FROM (Select TOP 页大小*页数 id
FROM 表
orDER BY id) AS T))
orDER BY ID
————————————-
分页方案三:(利用SQL的游标存储过程分页)
create procedure XiaoZhengGe
@sqlstr nvarchar(4000), –查询字符串
@currentpage int, –第N页
@pagesize int –每页行数
as
set nocount on
declare @P1 int, –P1是游标的id
@rowcount int
exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,@rowcount=@rowcount output
select ceiling(1.0*@rowcount/@pagesize) as 总页数–,@rowcount as 总行数,@currentpage as 当前页
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:如果没有主键,可以用临时表,也可以用方案三做,但是效率会低。
建议优化的时候,加上主键和索引,查询效率会提高。
通过SQL 查询分析器,显示比较:我的结论是:
分页方案二:(利用ID大于多少和Select TOP分页)效率最高,需要拼接SQL语句
分页方案一:(利用Not In和Select TOP分页) 效率次之,需要拼接SQL语句
分页方案三:(利用SQL的游标存储过程分页) 效率最差,但是最为通用
在实际情况中,要具体分析。