SQL Server Sum Columns From Two Tables With Condition - sql

Question

I have two tables:
Sales:
SaleID | DayNumber | Quantity | ProductID
1 | 1 | 10 | 1
2 | 1 | 150 | 4
3 | 1 | 70 | 6
4 | 2 | 30 | 2
5 | 2 | 40 | 3
6 | 2 | 45 | 5
7 | 2 | 15 | 8
and Products:
ProductID | Price
1 | 12
2 | 52
3 | 643
4 | 42
5 | 75
6 | 53
7 | 2
8 | 7
So I wanna do get some results, but I have no idea how can I do them. I want to calculate for example the sum of the sold products for days 2,3 and 4. And also the average earnings for each day.

Answer 1

i think you need this simple sum with join query
create table #sales
(id int not null identity(1,1),
DayNUmber int,
Quantity int,
ProductID int)
create table #Products(
id int not null identity(1,1),
Price money
)
insert #sales
values
(1,10,1),
(1,150,4),
(1,70,6),
(2,30,2),
(2,40,3),
(2,45,5),
(2,5,8);
insert #Products
values
(12),
(52),
(643),
(42),
(75),
(53),
(2),
(5);
select
sum(s.Quantity*p.Price) as [sum],
s.DayNumber from #sales s inner join #Products p
on s.ProductID=p.id where s.DayNumber in (2,3)
group by s.DayNUmber

Answer 2

Join on common ID.
Take sum of Quantity * Price.
Group by Day and filter as needed.
SELECT
SUM(Quantity*Price)
,DayNumber
FROM Sales s
INNER JOIN PRODUCT p ON p.ProductID = s.ProductID
WHERE DayNumber IN(2,3,4)
GROUP BY DayNumber

Answer 3

To make this work you need to JOIN the two tables in your query. You can then use SUM to calculate the sum of the sold products and earnings. To filter for days 2, 3, and 4 you can use IN in your WHERE clause.
SELECT S.DayNumber, SUM(S.Quantity) AS 'Products Sold', SUM(S.Quantity * P.Price) AS 'Total Earnings'
FROM Sales AS S JOIN Products AS P ON S.ProductID = P.ProductID
WHERE S.DayNumber IN (2, 3, 4)
GROUP BY S.DayNumber

Answer 4

You need AVG per day and Total Sale per day. Filter as per the days required
SELECT SUM(p.Price * s.Quantity) TotalsalePerday, AVG(p.Price * s.Quantity) AvgsalePerday ,s.DayNumber from SO_Products p
INNER JOIN SO_Sales s ON p.ProductID = s.ProductID
GROUP BY DayNumber
ORDER BY DayNumber
/------------------------
OUTPUT
------------------------/
TotalsalePerday AvgsalePerday DayNumber
--------------- ------------- -----------
10130 3376 1
30760 7690 2
(2 row(s) affected)