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SQL server 2005的简单分页程序

WBOY
WBOYOriginal
2016-06-07 16:21:40991browse

SQL Server 2005增加了不少新特性,其中NTILE和ROW_NUMER使得我们不再为SQL如何灵活方便的分页伤脑筋了(不必再羡慕Oracle等数据库了)。 下面就是一个很简单的分页查询语句: DECLARE @rows_per_page AS INTEGER DECLARE @current_page AS INTEGER DECLARE @t

   SQL Server 2005增加了不少新特性,其中NTILE和ROW_NUMER使得我们不再为SQL如何灵活方便的分页伤脑筋了(不必再羡慕Oracle等数据库了)。

  下面就是一个很简单的分页查询语句:

  DECLARE @rows_per_page AS INTEGER

  DECLARE @current_page AS INTEGER

  DECLARE @total_pages AS INTEGER

  -- 设置每页的行数

  SET @rows_per_page = 20

  -- 设置要显示的页号(从1开始)

  SET @current_page = 2

  -- 计算总页数

  SELECT @total_pages = COUNT(*) / @rows_per_page

  FROM testtable;

  -- 列出指定页的内容

  WITH t AS

  (

  SELECT NTILE(@total_pages) OVER(ORDER BY id) AS page_number, *

  FROM testtable

  )

  SELECT * from t

  WHERE page_number = @current_page

  程序简单到可以不用说明的程度。

  我们可以利用上述简单的语句,变化排序条件和查询表,就可以做出一个很通用的分页查询的存储过程或查询语句了。

  同样的,使用ROW_NUMBER也可以做到分页查询:

  DECLARE @rows_per_page AS INTEGER

  DECLARE @current_page AS INTEGER

  DECLARE @start_row_num AS INTEGER

  -- 设置每页的行数

  SET @rows_per_page = 20

  -- 设置要显示的页号(从1开始)

  SET @current_page = 2

  -- 设置开始行号

  SET @start_row_num = (@current_page - 1) * @rows_per_page

  WITH t AS

  (

  SELECT ROW_NUMBER() OVER(ORDER BY id) AS row_number, *

  FROM testtable

  )

  SELECT * from t

  WHERE row_number BETWEEN @start_row_num AND @start_row_num + @rows_per_page  似乎更简单的样子。

  至于哪种效率更高,这需要大家实际测试了。

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