Constraints example 13

What this example teaches

Constraints

Output

The query returns only the rows needed for a reporting query.

Line-by-line explanation

• Line 1 sets up the Constraints example: SELECT customer, total, status.
• Line 2 adds one required part of the working pattern: FROM orders.
• Line 3 adds the decision or filter that controls the result: WHERE total >= 62.
• Line 4 adds one required part of the working pattern: ORDER BY total DESC;.

Why this example is useful

This example is useful because it isolates constraints without surrounding noise, so you can see the idea clearly.

Where it is used in real projects

Constraints appears in real SQL work when a feature needs a clear pattern that can be reviewed and changed safely.

Beginner variation

Change one label, value or condition in the Constraints example and run it again.

Advanced variation

Combine Constraints with validation, error handling or reusable structure.