Oracle 排序

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 <=