建立表:
代码如下:
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
[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:
代码如下:
SELECT TOP 10 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 20 id
FROM TestTable
ORDER BY id))
ORDER BY ID
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:
代码如下:
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
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)
代码如下:
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
@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。