創建一個dblink create database link [LINKNAME] connect to [USERNAME(沒有引號)] identified by [PASSWORD(沒有引號)] u
class的getRecource()方法 AClass.class.getRecource(String path_name); 作用:首先得到AClass的路徑,然後以AClass的包路徑爲當前路徑,獲取path_
select to_date(to_char(v_start_date + (t.rn-1), 'yyyy-mm-dd'),'yyyy-mm-dd') as train_date from (select r