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Data Engineer Interview Questions
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Does database view occupy the disk space.
SQL - I was given 4 tables Sales, Product, Promotion and something else (Never had to use it). 1. Which product had the highest sales with promotions and sales ( basically a where clause on 2 flags) 2. What % of sales happened on the first and last day of promotion. I don't remember the rest.. I'd say your ability to translate regular english statements into SQL is tested very well
basic sql and python problem
Null +1 = ? Union and Union Alll which one is faster
"What data format should you use for a large amount of data?"
Based on my experience in different projects and analytical functions in SQL
You have this table - orders (order_id, customer_id, order_datetime, order_amt): 1)select top 10 paying customers for given month
Tell me about your self? What is Data Warehousing?
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