It would take Arjun’s team of five data engineers three days to answer that. By Thursday, the answer was already wrong, because new data had arrived. The spreadsheet they manually stitched together was a house of cards. They called it "Report Frankenstein."
And that, Arjun decided, was the ultimate victory. udemy - data warehouse - the ultimate guide
The Basement wasn't a physical place. It was a state of mind. It was the tangled web of 17 different operational databases—sales in PostgreSQL, user logins in MongoDB, customer support tickets in a messy MySQL dump, and marketing clickstream data living in a CSV file on an intern's laptop. It would take Arjun’s team of five data
The chart appeared. The room went silent. the answer was already wrong
He had a single dashboard open on the big screen.