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Mastering MySQL Stored Procedures (Part 2) & Stored Functions

In this video, we’ll dive deeper into Stored Procedures with IN and OUT parameters and explore Stored Functions in MySQL. These concepts help streamline database operations and improve efficiency.

1️⃣ Stored Procedures with IN and OUT Parameters
🔹 IN Parameter – Used to pass a value into the procedure, but it cannot be modified inside the procedure.
🔹 OUT Parameter – Allows the procedure to return a value that can be used outside the procedure.

✅ Use Case: A procedure that takes a department ID as input and returns the total salary of employees in that department.

2️⃣ MySQL Stored Functions
A Stored Function is a reusable SQL routine that always returns a single value and can be used inside queries like SELECT.

✅ Use Case: A function that calculates the tax amount based on salary and returns the computed value.

🔥 Why Use Stored Procedures & Functions?
🚀 Code Reusability – Avoids writing repetitive SQL logic.
🚀 Performance Optimization – Precompiled execution improves query speed.
🚀 Security & Control – Restricts direct table access and enforces business rules.

📌 What You’ll Learn in This Video:
🔹 How to create Stored Procedures with IN and OUT parameters.
🔹 How to define and use Stored Functions effectively.
🔹 Best practices for writing optimized SQL routines.

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