求三个UPDATE语句
DROP TABLE JJ;
DROP TABLE QQ;
Create table jj(
  jj_id integer,-- 物理主键
  REPORT_M_ID INTEGER,--主表ID
  ITEM_ID VARCHAR2(20),--项目
  Year varchar2(6),--报表年份
  Org_Code varchar2(10),--组织机构编码
  JAN integer, --1月
  FER INTEGER,--2月
  MAR INTEGER,--3月
  BUSS_TYPE varchar2(10)--经营业务
);
CREATE TABLE QQ(
  QQ_id integer,-- 物理主键
  REPORT_M_ID INTEGER,--主表ID
  ITEM_ID VARCHAR2(20),--项目
  Year varchar2(6),--报表年份
  Org_Code varchar2(10),--组织机构编码
  JAN integer, --1月
  FER INTEGER,--2月
  MAR INTEGER,--3月
  BUSS_TYPE varchar2(10)--经营业务
);
--JJ表，jj_id是物理主键，ITEM_ID+Year+Org_Code+BUSS_TYPE是业务组合主键，QQ表类似。
--相同的ITEM_ID+Year+Org_Code，即使BUSS_TYPE不同，但其REPORT_M_ID(主表ID)是一样的
--测试数据
insert into jj select 1,1,'A001_01','201206','H2222',3,3,3,'AA' FROM DUAL;
insert into jj select 2,1,'A001_02','201206','H2222',4,4,4,'AA' FROM DUAL;
insert into jj select 3,1,'A001_03','201206','H2222',5,5,5,'AA' FROM DUAL;
insert into jj select 4,1,'A001_01','201206','H2222',6,6,6,'BB' FROM DUAL;
insert into jj select 5,1,'A001_02','201206','H2222',7,7,7,'BB' FROM DUAL;
insert into jj select 6,1,'A001_03','201206','H2222',8,8,8,'BB' FROM DUAL;
insert into jj select 7,1,'A001_01','201206','H2222',6,6,6,'CC' FROM DUAL;
insert into jj select 8,1,'A001_02','201206','H2222',7,7,7,'CC' FROM DUAL;
insert into jj select 9,1,'A001_03','201206','H2222',8,8,8,'CC' FROM DUAL;
insert into jj select 10,3,'A001_01','201207','H2222',33,33,33,'AA' FROM DUAL;
insert into jj select 11,3,'A001_02','201207','H2222',44,44,44,'AA' FROM DUAL;
insert into jj select 12,3,'A001_03','201207','H2222',55,55,55,'AA' FROM DUAL;
insert into jj select 13,3,'A001_01','201207','H2222',66,66,66,'BB' FROM DUAL;
insert into jj select 14,3,'A001_02','201207','H2222',77,77,77,'BB' FROM DUAL;
insert into jj select 15,3,'A001_03','201207','H2222',88,88,88,'BB' FROM DUAL;
insert into jj select 16,3,'A001_01','201207','H2222',66,66,66,'CC' FROM DUAL;
insert into jj select 17,3,'A001_02','201207','H2222',77,77,77,'CC' FROM DUAL;
insert into jj select 18,3,'A001_03','201207','H2222',88,88,88,'CC' FROM DUAL;

insert into QQ select 1,2,'B001_01','201206','H2222',11,11,11,'AA' FROM DUAL;
insert into QQ select 2,2,'B001_02','201206','H2222',12,12,12,'AA' FROM DUAL;
insert into QQ select 3,2,'B001_03','201206','H2222',13,13,13,'AA' FROM DUAL;
insert into QQ select 4,2,'B001_01','201206','H2222',14,14,14,'BB' FROM DUAL;
insert into QQ select 5,2,'B001_02','201206','H2222',15,15,15,'BB' FROM DUAL;
insert into QQ select 6,2,'B001_03','201206','H2222',16,16,16,'BB' FROM DUAL;
insert into QQ select 7,4,'B001_01','201207','H2222',111,111,111,'AA' FROM DUAL;
insert into QQ select 8,4,'B001_02','201207','H2222',122,122,122,'AA' FROM DUAL;
insert into QQ select 9,4,'B001_03','201207','H2222',133,133,133,'AA' FROM DUAL;
insert into QQ select 10,4,'B001_01','201207','H2222',144,144,144,'BB' FROM DUAL;
insert into QQ select 11,4,'B001_02','201207','H2222',155,155,155,'BB' FROM DUAL;
insert into QQ select 12,4,'B001_03','201207','H2222',166,166,166,'BB' FROM DUAL;


--第一、求UPDATE语句，修改A001_03的值 ，公式A001_03=B001_01+B001_03，修改后结果如下：
insert into jj select 3,1,'A001_03','201206','H2222',24,24,24,'AA' FROM DUAL;
insert into jj select 6,1,'A001_03','201206','H2222',30,30,30,'BB' FROM DUAL;
insert into jj select 12,3,'A001_03','201207','H2222',244,244,244,'AA' FROM DUAL;
insert into jj select 15,3,'A001_03','201207','H2222',310,310,310,'BB' FROM DUAL;

--第二、求UPDATE语句，修改A001_03的值 ，公式A001_03=A001_01+B001_01