oracle一些函数的使用备忘

使用row_number over......排重

select * from(
select t.fkrsfzh,t.fkrxm, row_number() over(partition by t.fkrxm order by fkrxm desc) pm from tableName t
)T2 where T2.pm=1

使用wm_concat在group by后将某一列进行连接

select count(*),fkrsfzh,wm_concat(fkrxm)
from tableName group by fkrsfzh