SQL - GROUP BY not working with DateName

Question

I'm trying to extract how many times a particular thing happened on each day of the week. Here is what I tried:

SELECT Source , Event, Qty, DateName(WEEKDAY,( TranDate )) As DayOfWk
FROM OurDB
GROUP BY Source, Event, DateName(WEEKDAY,( TranDate )), Qty

But it isn't grouping by Source (which only has two possible values). If I take out the DateName function, then everything groups correctly. Basically I'm looking to get:

• Source 1
  • Event 1
    • Monday - 15
    • Tuesday - 12
  • Event 2
    • Monday - 11
    • Thursday - 6
• Source 2
  • Event 1
    • Monday ...etc

EDIT: Added row data

OurDB:

• Source, Event, TranDate, Qty
• Phone, Coupon 1, 7/2/15, 6
• Internet, Coupon 4, 8/2/15, 2
• Internet, Coupon 1, 6/1/15, 5
• Internet, Coupon 1, 6/8/15, 4
• Phone, Coupon 2, 8/2/15, 4
• Phone, Coupon 1, 7/3/15, 10
• Internet, Coupon 1, 6/5/15, 3

Desired Output:

• Internet, Coupon 1, Monday, 9
• Internet, Coupon 1, Friday, 3
• Internet, Coupon 4, Sunday, 2
• Phone, Coupon 1, Thursday, 6
• Phone, Coupon 1, Friday, 10
• Phone, Coupon 2, Sunday, 4

Answer 1

SELECT Source , Event, max(Qty) --or min of qty
,DateName(WEEKDAY,( TranDate )) As DayOfWk
FROM OurDB
GROUP BY Source, Event, DateName(WEEKDAY,( TranDate ))

Your query didnot have a aggregate function. From the expected result, it looks like you have to use a aggregate function on Qty column.