我将标准SQL连接转换为旧的Oracle连接语法时遇到问题(请不要问我为什么需要这样做).无论如何,我都希望得到同样的结果,不是:
样本数据:
create table testing (
aid number(8),
bid number(8),
btext varchar(80));
insert into testing values (100,1,'text1a');
insert into testing values (100,2,'text1b');
insert into testing values (100,3,'text1c');
insert into testing values (200,19,'text2b');
insert into testing values (200,18,'text2a');
insert into testing values (300,4324,'text3a');
insert into testing values (500,80,'text4a');
insert into testing values (50,2000,'text5a');
commit;
标准SQL:
select a.*,b.* from testing a
left outer join testing b
on (a.aid = b.aid and a.bid < b.bid)
order by a.aid, b.bid;
AID BID BTEXT AID_1 BID_1 BTEXT_1
50 200 text5a NULL NULL NULL
100 1 text1a 100 2 text1b
100 2 text1b 100 3 text1c
100 1 text1a 100 3 text1c
100 3 text1c NULL NULL NULL
200 18 text2a 200 19 text2b
200 19 text2b NULL NULL NULL
300 432 text3a NULL NULL NULL
500 80 text4a NULL NULL NULL
Oracle SQL:
select a.*,b.* from testing a, testing b
where a.aid = b.aid(+)
and a.bid < b.bid
order by a.aid, b.bid;
AID BID BTEXT AID_1 BID_1 BTEXT_1
100 1 text1a 100 2 text1b
100 2 text1b 100 3 text1c
100 1 text1a 100 3 text1c
200 18 text2a 200 19 text2b
如何使用Oracle的旧式语法获得标准SQL的相同结果?