5 SQL FUNCTIONS EVERY BEGINNER SHOULD KNOW

"Data is the new oil — and SQL is the refinery." — Anonymous Data Engineer Image: A developer working with databases — the everyday environment of an SQL practitioner. Table of Contents Introduction What Is SQL? Function 1 — COUNT() Function 2 — SUM() Function 3 — AVG() Function 4 — UPPER() and LOWER() Function 5 — CONCAT() Combining Functions Together Best Practices Conclusion Introduction If you have ever opened a spreadsheet and thought, "There has to be a better way to manage this data," — y