Oracle SQL - Sum and group data by week

Question

I have records related to dates:

DATE         AMOUNT
16.03.2013   3
16.03.2013   4
16.03.2013   1
16.03.2013   3
17.03.2013   4
17.03.2014   3

Answer 1

I guess this would help as well....

 /* Weekly sum of values */
 SELECT SUM( Amount ) as Sum_Amt, 
 DATEPART (wk, Date) as WeekNum
 FROM databse_name.table_name
 GROUP BY DATEPART (wk, Date)
 ORDER BY WeekNum

 /* Monthly sum of values */
 SELECT SUM( Amount ) as Sum_Amt, 
 DATEPART (mm, Date) as MonNum
 FROM databse_name.table_name
 GROUP BY DATEPART (mm, Date)
 ORDER BY MonNum