Outer Join don't know the smallest and largest join until the run time column

Hello, I have three tables and I don't know which one is the smallest game of the outer join column. So, how can I join them and the following output.
If I know in advance, which is the largest and which one is the smallest game so I can use something like below, but what if I don't know which is the smallest together or we're great together?

Test case and the request for a fixed set, smaller and more large set case:


Select x1.nm, cnt1, cnt2, cvt3.cnt cnt3
Of
(
Select cvt1.nm, cvt1.cnt cnt1, cnt2 in cvt1 cvt2.cnt, cvt2
where cvt1.nm = cvt2.nm (+)
) x 1, cvt3
where x1.nm = cvt3.nm (+)


NM CNT1, CNT2 CNT3
-- ---------- ---------- ----------
A 1 101
B 2 102
C 3
4 1001 D
5 1002 E

create table cvt1 (nm varchar2 (1), cnt1 number)
/
create table cvt2 (nm varchar2 (1), number of cnt2)
/
create table cvt3 (nm varchar2 (1), cnt3 number)
/

insert into cvt1 select 'A', 1 double
/
insert into cvt1 select 'B', 2 of the double
/
insert into cvt1 select 'C', 3 double
/
INSERT into cvt1 select would be ', 4 of the double
/
insert into cvt1 select 'E', 5 double

Insert into select cvt2 'A', 101 double
/
Insert into cvt2 select 'B', 102 of the double
/
Insert into select 'C', 103 double cvt2
/

INSERT into cvt3 select would be ', double 1001
/
insert into cvt3 select 'E', 1002 double
/

Published by: xwo0owx on March 31, 2011 12:48

Tags: Database

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