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1. What Is SQL and Why Analysts Need It

1.6 Map of This SQL Course and How to Practise

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Why. A map stops you from jumping to hard chapters too soon.

What. Block A = foundations. Then NULL, CASE, aggregates, GROUP BY. Later joins, windows, bridges to Excel/Power BI/Python.

How. Each chapter: read Why→What→How, run the example, do practice, take the quiz, keep a card on your phone.

Steps

  1. Finish ch01–ch05 first.
  2. Add ch07 NULL and ch08 CASE early — interviews love them.
  3. Use raja_coffee and interview_mini every day for 15 minutes.

Ravindra Bagale's Tip

Chala mitrano — small daily practice beats one long weekend binge.