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How to write a query to get cumulative spending?

Question

Assume you are given a table for spending activity by product type which has column names as order_id, user_id, product_id, spend, date . How to write a query to calculate the cumulative spend for each product over time in chronological ...

in progress 1

SQL Anonymous 55 years 2 Answers 1091 views

Demand and Supply increased by 10% but total booking was down by 10% for a particular week, Why?

Question

I work at Uber and found out that for a particular week, number of drivers who signed up for the service increased by 10% and so was the increase in the number of users using the app. But, the number ...

solved 3

Case Study 55 years 24 Answers 1494 views Grand Master

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How to write a query to get cumulative spending?

Demand and Supply increased by 10% but total booking was down by 10% for a particular week, Why?