Week | 4 Complete Data Analytics | Question 3

Given a table named Orders with columns OrderID, OrderDate, and TotalAmount, which SQL query calculates the average total amount for each month?

(A)

SELECT
MONTH(OrderDate) AS Month,
AVG(TotalAmount) AS AvgAmount
FROM Orders
GROUP BY MONTH(OrderDate);

(B)

WITH MonthlyAvg AS (
SELECT
MONTH(OrderDate) AS Month,
AVG(TotalAmount) AS AvgAmount
FROM Orders
GROUP BY MONTH(OrderDate)
)
SELECT * FROM MonthlyAvg;

(C)

SELECT
OrderDate,
AVG(TotalAmount) OVER (PARTITION BY MONTH(OrderDate)) AS AvgAmount
FROM Orders;

(D)

SELECT
OrderDate,
AVG(TotalAmount) AS AvgAmount
FROM Orders
GROUP BY OrderDate;

Answer

Please comment below if you find anything wrong in the above post
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