Convert Date into Week Rage

Below is an example of how to display dates into week Range in Oracle
For E.g. 22-Nov-08 is in the date range 17-Nov-08 to 23-Nov-08

Firstly lets see how to get week of the year. Following query can be used to get this

SELECT to_char(sysdate,'WW') FROM Dual;

Now lets get the week range
SELECT TO_CHAR (TRUNC (SYSDATE, 'IYYY') + ((TO_CHAR (SYSDATE, 'WW') - 1) * 7), 'DD-MON-RR')
|| ' to '
|| TO_CHAR (TRUNC (SYSDATE, 'IYYY') + ((TO_CHAR (SYSDATE, 'WW')) * 7)-1, 'DD-MON-RR') week_range
FROM Dual;
Output
======
The output of above query for date 29-Nov-2008 is 24-NOV-08 to 30-NOV-08