📊 SQL Aggregate Functions

Aggregates perform calculations on groups of values and return a single result. Commonly used for reporting, analytics, and dashboards.

✅ Most-Used Aggregate Functions:

• COUNT() — Counts number of records
• SUM() — Adds up values
• AVG() — Calculates average
• MAX() — Returns highest value
• MIN() — Returns lowest value

📖 Example: Count All Orders