按拼音排序
select * from perexl order by nlssort(danwei,\'NLS_SORT=SCHINESE_PINYIN_M\');
按部首排序
select * from perexl order by nlssort(danwei,\'NLS_SORT=SCHINESE_STROKE_M\');
按笔画排序
select * from perexl order by nlssort(danwei,\'NLS_SORT=SCHINESE_RADICAL_M\');
排序后获取第一行数据
select * from (select * from perexl order by nlssort (danwei,\'NLS_SORT=SCHINESE_PINYIN_M\') )C where rownum=1
将nulls始终放在最前
select * from perexl order by danwei nulls first
将nulls始终放在最后
select * from perexl order by danwei desc nulls last
decode函数比nvl函数更强大，同样它也可以将输入参数为空时转换为一特定值
select * from perexl order by decode(danwei,null,\'单位是空\', danwei)
标准的rownum分页查询使用方法
select *from (select c.*, rownum rn from personnel c)where rn >= 1and rn <= 5
在Oracle语句rownum对Oracle 排序分页的解决方案
但是如果, 加上order by 姓名 排序则数据显示不正确
select *from (select c.*, rownum rn from personnel c order by 出生年月)where rn >= 1and rn <= 5
解决方法，再加一层查询，则可以解决
select *from (select rownum rn, t.*from (select 姓名, 出生年月 from personnel order by 出生年月 desc) t)where rn >= 1and rn <=