Can I rewrite the following query without using Row_number() function ??!!
829179Jan 13 2011 — edited Jan 13 2011Hello every one, can I rewrite the following query without using the 'ROW_NUMBER() OVER ' part.
The query is supposed to pull out the records whose CODE is not NULL and has most
recent date for UPDATE_DATE . The reason I wanted to do this is, When I embed this query
in between many other queries along with JOINs, My oracle server is unable to execute. So, I thought
its better to supplant 'ROW_NUMBER() OVER ' logic with something else and try it. .
SELECT a.* FROM
(SELECT b.*, ROW_NUMBER() OVER (PARTITION BY b.PIDM
ORDER BY b.UPDATE_DATE DESC) AS Rno
FROM
(
SELECT *
FROM SHYNCRO WHERE CODE IS NOT NULL
)b
)a
WHERE a.Rno = 1