SQL – Stored Procedures

A stored procedure is a named collection of SQL statements saved inside the database itself. Instead of sending a long SQL query from your application every time, you simply call the procedure by name and pass any required parameters. The database executes the stored logic directly — faster, more secure, and reusable.

SQLite does not support stored procedures (it uses application-level logic instead), but MySQL, PostgreSQL, and SQL Server do. Below we simulate the concept using a CTE-based approach that demonstrates the same reusable computation pattern.

MySQL / PostgreSQL syntax

CREATE PROCEDURE GetTopStudents(IN min_score REAL)
BEGIN
  SELECT name, score
  FROM students
  WHERE score >= min_score
  ORDER BY score DESC;
END;

-- Calling it:
CALL GetTopStudents(85);

Try It Yourself — Interactive SQL Editor

Edit the query below and click Run Query ▶ to see live results powered by SQLite running directly in your browser.

Key Points

• Stored procedures are saved SQL programs in the database
• They accept parameters and can contain flow control (IF, LOOP)
• Reduce network round-trips between app and database
• SQLite uses application logic instead; MySQL/PG/SQL Server support them fully

Pro Tip from CodesCompiler: The best way to learn SQL is to break things intentionally — modify the query above, change the WHERE conditions, try different columns. Every error teaches you something the docs cannot.

In the next lesson, we continue exploring SQL’s powerful feature set to build your database mastery.