Query to retrieve latest version

Question

Hi,
I am trying to create a query that retreives the latetst version of a product. There are 2 tables I query from, one has the product number and one has the version- a varchar2(60) datatype. The versions are listed A,B,C..... etc. So I want the query to give me one row for each product with its latest version. This is the query I have thus far,
SELECT A0.Prod_num, A0.version
FROM (SELECT A0B.Prod_num, A0.version
     FROM tb_1 A0,tb_2 A0B
     WHERE (A0.tb_1pk=A0B.tb_2pk)) A0
order by A0.Prod_num
This returns duplicate rows of products and versions.
Thanks.

Answer 1

sybrand_b wrote:
SELECT A0B.Prod_num, A0.version
FROM tb_1 a0, tb_2 A0B
where a0.tb_1pk = a0b.tb_2pk
and a0.version =
(select max(version)
from tb_1 a0a
where a0a.tb_1pk = a0.tb_1pk
Question: This aren't the real table and column names, hopefully, are they?
They are so cryptic the chance for erroreneous statements is 99.9 percent!
Sybrand Bakker
Senior Oracle DBASybrand,
If you think these names are cryptic, the actual names names are much, much worse. This a COTS application and the datatbase object names, for some reason, are completely random and counter-intuitive.
Thanks for the query solution!