主流数据库分页SQL语句

sql语句分页，不同的数据库下的分页方案各不一样，下面是主流的三种数据库的分页sql：

sql server:

         String sql =

         "select top " + pageSize + " * from students where id not in" +

 "(select top " + pageSize * (pageNumber-1) + " id from students order by id)" +

 "order by id";

mysql:

         String sql =

         "select * from students order by id limit " + pageSize*(pageNumber-1) + "," + pageSize;

oracle:

         String sql =

          "select * from " +  

          (select *,rownum rid from (select * from students order by postime desc) where rid<=" + pagesize*pagenumber + ") as t" +

          "where t>" + pageSize*(pageNumber-1);