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SQLServer存储过程的分页

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Release: 2016-06-07 15:40:01
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SQL Server 存储过程的分页,这个问题已经讨论过几年了,很多朋友在问我,所以在此发表一下我的观点 建立表: CREATE TABLE [TestTable] ( [ID] [int] IDENTITY (1, 1) NOT NULL , [FirstName] [nvarchar] (100) COLLATE Chinese_PRC_CI_AS NULL , [LastName]

SQL Server 存储过程的分页,这个问题已经讨论过几年了,很多朋友在问我,所以在此发表一下我的观点

  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

  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

可能用到的:

declare @a int
set @a = 1002

exec('select top ' + @a + ' id  from testtable' ) 

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