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How can I practice SQL without real company data?
I want to improve my SQL by solving realistic problems. What types of datasets and exercises are useful for practicing joins, aggregations, subqueries and…
I want to improve my SQL by solving realistic problems. What types of datasets and exercises are useful for practicing joins, aggregations, subqueries and…
I know SELECT, WHERE, GROUP BY and joins. What should I learn next to become comfortable with real analytics work?
When should an analyst use Excel and when should they use SQL? Can a beginner learn both at the same time, and how do…