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create table A (code varchar2(10),parentcode varchar2(10));
--µÚÒ»¼¶±ð
insert into A values('1506001','');
--µÚ¶þ¼¶±ð
insert into A values('A-1','1506001');
insert into A values('B-1','1506001');
insert into A values('A-2','1506001');
insert into A values('C-1','1506001');
--µÚÈý¼¶±ð
insert into A values('12324','A-1');
insert into A values('32434','A-1');
insert into A values('aaaaa','A-2');
insert into A values('ccccc','C-1');
insert into A values('bbbbb','B-1');
DELETE from A
select * from A
--B±í
--¶þ¼¶¿ÉÄÜÓÐÊý¾Ý£¬Ò²¿ÉÄÜûÓÐ
create table B(code varchar2(10),value int);
insert into B values('A-1',200);
insert into B values('B-1',50);
insert into B values('12324',522);
insert into B values('32434',500);
insert into B values('aaaaa',100);
insert into B values('ccccc',200);
insert into B values('bbbbb',300);
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