Tell me the concept of SQL

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⚹ SQL (Structured Query Language) is a standardized programming language used for managing and manipulating relational databases. ⚹ ∻Key Concepts of SQL∻ ‖ ▪ ⋮ **Data Definition Language (DDL)**: Used to define and manage database schema. Examples include `CREATE`, `ALTER`, and `DROP` statements. ‖ ‖ ▪ ⋮ **Data Manipulation Language (DML)**: Used for data manipulation within the database. Examples include `SELECT`, `INSERT`, `UPDATE`, and `DELETE` statements. ‖ ‖ ▪ ⋮ **Data Control Language (DCL)**: Used to control access to data within the database. Examples include `GRANT` and `REVOKE` statements. ‖ ‖ ▪ ⋮ **Transaction Control Language (TCL)**: Used to manage transactions within the database. Examples include `COMMIT`, `ROLLBACK`, and `SAVEPOINT` statements. ‖ ‖ ▪ ⋮ **Querying Data**: The `SELECT` statement is used to query data from one or more tables. It can include various clauses like `WHERE`, `GROUP BY`, `HAVING`, and `ORDER BY` to filter and sort data. ‖ ‖ ▪ ⋮ **Joins**: SQL supports various types of joins (e.g., INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN) to combine rows from two or more tables based on a related column. ‖ ‖ ▪ ⋮ **Indexes**: Used to speed up the retrieval of rows by creating a data structure that allows for faster searches. ‖ ‖ ▪ ⋮ **Views**: Virtual tables created by a query that can simplify complex queries and enhance security by restricting access to specific data. ‖ ‖ ▪ ⋮ **Stored Procedures and Functions**: SQL allows the creation of reusable code blocks that can be executed as needed, improving efficiency and maintainability. ‖ ⚹ SQL is essential for database management and is widely used in various applications to handle data efficiently. ⚹

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