1.总结Oracle 、sqlserver和mysql中查询10-20条记录的写法

     一: oracle数据库写法:

 

1:select * from (select rownum rn ,* from 表名 wher rownum<20) a
    where a.rn>10
    2:select * from 表名 where rownum<20
      minus
      select * from 表名 where rownum<10

      二:SqlServer数据库写法:

    

1:select top 20 * from tablename where id not?exists (select top 10 * from tablename)//前20条记录再过滤掉前10条
      2:select top10 * from (select top 20 * from order by column) order by column desc//子查询中取20条倒序,然后从子查询中取前10条

      三:mysql的写法:

     

select * from tablename where LIMIT 9,10