群裡提問（二） 關於多層級資料彙總

解決方案：create table t_20120512_a ( id varchar2(6) primary key, cost number(3), p2 number(3), p3 number(3) ) / create table t_20120512_b ( id varchar2(6) primary key, name varchar2(50), b varchar2(100) ) / insert into t_20120512_a values ('100',1,1,1); insert into t_20120512_a values ('101001',2,2,2); insert into t_20120512_a values ('101002',3,3,3); commit; insert into t_20120512_b values ('100','語文',null); insert into t_20120512_b values ('101','物理',null); insert in...

Link URL: http://lwhjava.itpub.net/post/43533/528261