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मुफ़्तData Science

SQL

Go from your first SELECT to real analytics: joins, subqueries, window functions, designing your own schema, and a full analytics project on a real public dataset.

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Learn to query a relational database: SELECT, WHERE, GROUP BY, and aggregate functions.

  • freeCodeCamp.org
    • Write SELECT statements with filtering and sorting
    • Use WHERE, GROUP BY, and HAVING
    • Apply aggregate functions (COUNT, SUM, AVG)
    • Understand primary and foreign keys