SQL Server 存储过程的分页
时间:2011-01-12 来源:梅子
--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)
SELECT TOP 10 * FROM TestTable
WHERE (ID NOT IN (SELECT TOP 20 id FROM TestTable ORDER BY id)) ORDER BY ID
--SELECT TOP 每页显示数* FROM TestTable
--WHERE (ID NOT IN (SELECT TOP 从第几条开始(页数*每页显示数) id FROM TestTable ORDER BY id)) ORDER BY ID
-------------------------------------
--分页方案二:(利用ID大于多少和SELECT TOP分页)
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 每页显示数* FROM TestTable
--WHERE (ID > (SELECT MAX(id) FROM (SELECT TOP 页数*每页显示数id FROM TestTable 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 PagingProduce
@sqlstr nvarchar(4000), --查询字符串
@currentpage int, --第N页
@pagesize int --每页显示数
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。
(转载)