SQL server 2005的简单分页程序
SQL2005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 INTEGERDECLARE @current_page AS INTEGERDECLARE @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_pageFROM 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 INTEGERDECLARE @current_page AS INTEGERDECLARE @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。
http://ly4cn.cnblogs.com/archive/2006/07/11/447905.html