Practice SQL Window Functions | Xorthax's Trading Post

Tables Used

customers

Column	Type
customerid	bigint
name	text
species	text
contactinfo	text
loyaltystatus	text
joindate	text

orderdetails

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

orders

Column	Type
orderid	bigint
customerid	bigint
orderdate	timestamp without time zone
totalamount	double precision
status	text

products

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

Expected Output

Column
customerid
category
totalspending
spendingrank
spendingcumedist

69. Category Spending Footprint

Rank customer spending within categories and calculate cumulative percentages.

Xorthax wants to analyze his top customers' spending patterns by product category. Write a query to calculate the rank of each customer's total spending within a category and the cumulative percentage of spending across all categories.

Write Your Query