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

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
productid
orderid
orderdate
runningtotal

2. The Interstellar Sales Tracker 9000

Compute a running total of product sales by cosmic order date.

The merchants of Zlacksys 19, led by Xorthax, want to analyze the running total of revenue generated for each product sold in his trading post. Calculate the running total of product sales, partitioned by product and ordered by the interstellar order date.

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