Practice SQL Window Functions | Xorthax's Trading Post

Tables Used

orderdetails

Column	Type
orderdetailid	bigint
orderid	bigint
productid	bigint
quantity	bigint
unitprice	double precision
currencyid	bigint

products

Column	Type
productid	bigint
name	text
description	text
category	text
price	double precision
supplierid	bigint
stockquantity	bigint

suppliers

Column	Type
supplierid	bigint
name	text
originplanet	text
contactinfo	text
rating	double precision

Expected Output

Column
category
productname
totalsales
salesrank
rollingsales

72. Rolling Sales by Category

Rank products by total quantity sold and compute the rolling sales total per category.

The merchants guild wants to analyze the popularity of products by category. Write a query to rank products by total quantity sold and calculate the rolling sum of sales for each product category.

Write Your Query