Web Reference: Mar 27, 2026 · Practice with 60 real SQL interview questions for data roles organized by difficulty. Short answers, code examples, diagrams, and a self-assessment quiz to test your readiness. Practice real SQL Interview Questions asked by Amazon, Google, Facebook (Meta), and other FAANG companies during Data Science and Data Analyst interviews. The GROUP BYclause enables us to compute aggregate values alongside discrete data by collapsing the distinct rows of our database into summary rows that share a particular characteristic. If you were to attempt to formulate a query selecting a number of rows with a WHERE clause, and then display an aggregate value alongside, you would find that the...
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