根据时间条件排序,取前十条和后十条。
【第1句】:有时间字段, 根据时间条件排序,取前十条和后十条
(1)前十条:
select * from (select * from tab_name a order by date_col )
where rownum<11;
(2)后十条:
select * from (select * from tab_name a order by date_col desc)
where rownum<11;
【第2句】:没有时间字段, 直接根据物理存储顺序,取前十条和后十条
(1)前十条:
select * from (select * from tab_name a order by rownum)
where rownum<11;
(2)后十条:
select * from (select * from tab_name a order by rownuml desc)
where rownum<11;