Question

Possible Duplicate:
Calculate difference between 2 date / times in Oracle SQL

I have a table where PurchasedDate is maintained. I have to get the date from the system and calculate the date difference in days. datediff() is not giving tHe result as I am working in Oracle.

Sample table:

ProductID  Date
P101       31-DEC-2012
P102       29-DEC-2011

If P102 is returned today, the difference should be 10.

Here is a detailed description

BillID     ProductID   Date
101          P101        31-DEC-2012
101          P102        31-DEC-2012
102          P405        29-JUN-2012
102          P210        29-JUN-2012
105          P205         2-MAY-2012

If a customer comes to retun a product P101 with BillNo 101, then the system should calcualte the difference between the return date(which is the system date) and the purchased date. The answer for P101 should be 10 if its returned on Jan 8 2012

Answer 1

try

SELECT trunc(sysdate) - PurchasedDate 
  FROM table_name;