Oracle分页查询和SQL server分页查询总结

分页查询是项目中必不可少的一部分，难倒是不难，就是这些东西，长时间不用，就忘的一干二净了。今天特此总结一下这两款数据库分页查询的实现过程（只记录效率比较高的）

一.Oracle中的分页查询

　　1.通用分页查询模板

 SELECT *
        FROM (SELECT x.*, rownum as m FROM ({0}) x)    --{0}为嵌套的查询语句或为一张表
       WHERE m >= {1}                                  --{1}取值的最小范围
         AND m <= {2}                                  --{2}取值的最大范围

　　　查询的原理是，先用一个子查询，将查询得到的数据进行排列，最外层的查询再根据rownum取范围，下面贴一个实例，方便以后查看

     SELECT *
        FROM (SELECT x.*, rownum as r FROM (
          select c.* from Cars c join ResCommend r on c.Id=r.ResId where r.Posld=2 and DeadLine>SYSDATE and c.IsPub='是'   order by r.Weight desc
                  ) x)
       WHERE r >= 0
         AND r <= 6
                  

二.Sqlserver中的分页查询

　　1.用row_number() over()进行分页

               select *
                   from (select row_number() over(order by Weight desc) as rownumber,* from ({0}) as hello) as newtable   --{0}为嵌套的查询语句或为一张表
                        where rownumber>={1}                                                                       --{1}取值的最小范围
                          and rownumber<={2}                                                                     --取值的最大范围

　　　查询的原理是，先用row_number()将查询到的数据进行排列，最外层的查询再根据rownumber取范围，下面贴一个实例

          select * from (select row_number() over(order by Weight desc) as rownumber,* from (
           select c.*,r.Weight from Cars c join ResCommend r on c.Id=r.ResId where r.Posld=2 and DeadLine>GETDATE() and c.IsPub='是'
                  ) as hello) as newtable where rownumber>=0 and rownumber<=6