How to extract week number in sql

Question

I have a transdate column of varchar2 type which has the following entrees

01/02/2012
01/03/2012

etc.

I converted it in to date fo

Answer 1

Try to replace 'w' for 'iw'. For example:

SELECT to_char(to_date(TRANSDATE, 'dd-mm-yyyy'), 'iw') as weeknumber from YOUR_TABLE;