Stored procedures are reusable blocks of SQL code that are stored within the database. Think of them as mini-programs designed to perform specific tasks. They encapsulate a series of SQL statements, making them highly efficient and organized. Instead of writing the same SQL code repeatedly in different parts of your application, you define it once in the database and call it whenever needed. This significantly improves code maintainability, as changes to the procedure affect all parts of the application that use it. Stored procedures also enhance security by limiting direct access to the database. Applications interact with the database through the procedure, not directly with the underlying SQL statements, which reduces the risk of SQL injection vulnerabilities. Finally, stored procedures often improve performance by allowing the database server to optimize the code once, rather than repeatedly parsing and executing the same code within each application request.
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