SQL is the language that powers data management, and mastering its core commands is essential for anyone working with databases. Let’s break them down into five main categories:

✅ DQL (Data Query Language): Retrieve data from databases using commands like:

  • SELECT — Extract specific data from tables.
  • WHERE — Filter records based on conditions.
  • JOIN — Combine rows from multiple tables.

✅ DML (Data Manipulation Language): Modify data with commands such as:

  • INSERT — Add new records.
  • UPDATE — Modify existing records.
  • DELETE — Remove records.

✅ DDL (Data Definition Language): Define and manage database structures:

  • CREATE — Add new tables or databases.
  • ALTER — Modify table structures.
  • DROP — Remove tables or databases.

✅ DCL (Data Control Language): Control access to the database with:

  • GRANT — Provide specific privileges to users.
  • REVOKE — Remove previously granted privileges.

✅ TCL (Transaction Control Language): Manage transactions to maintain data integrity:

  • COMMIT — Save changes permanently.
  • ROLLBACK — Undo changes if an error occurs.

Mastering these commands gives you the power to handle data efficiently, ensuring your applications run smoothly and securely. 🚀

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