SQL Subqueries: The Complete Guide
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Pooja Pawar, PhD | Python | SQL | Power BI | Excel on Instagram: "SQL isn’t just for querying data — it’s the language of every serious data professional. This 10-stage roadmap walks you from simple SELECT statements to advanced A/B testing queries used in real data science workflows. Here’s the journey: • Start with the foundations (SELECT, WHERE, ORDER BY). • Move into aggregation, joins, and subqueries. • Master window functions and data cleaning. • Engineer and label features for ML models.
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