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docs: Add structured DBMS notes — Shiwans #387

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@shiwans-k-yadav shiwans-k-yadav commented Oct 3, 2025

Added structured DBMS notes for beginners covering:

  • Introduction to DBMS
  • Types of DBMS
  • Key Concepts (Tables, Keys)
  • Normalization (1NF, 2NF, 3NF)
  • ACID Properties
  • Transactions (Commit / Rollback)
  • Basic SQL commands (SELECT, INSERT, UPDATE, DELETE)
  • Use-cases and examples of RDBMS vs NoSQL

This is a non-code contribution aimed at helping beginners quickly understand DBMS concepts.

Contributed by: Shiwans Kumar Yadav

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Thank you for contributing to codemistic. We love you and your PR ❤️🎉 . Waiting for you to contribute again to Codemistic.

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