主流总结下MYSQL。sqlSever 和oracle寻呼代码数据库。如下面:
MySQL:select * from TableName where …… limit start_th , count_num; SqlSever:select top count_num from TableName where id not in (select top count_num from TableName where ……)。
Oracle:select t2.* from (select t1.* ,rownum rn from (select * from TabbleName where ……) t1 where rownum <=endline ) t2 where t2.rn>=start_line;oracle 的条件筛选都放在最内层进行第一层筛选。剔除末尾的(第二层),剔除头部的(第三层)
供你参考!
版权声明:本文博客原创文章。博客,未经同意,不得转载。