SELECT Queries & Filtering - Concepts
Explore the key concepts of select queries & filtering with practical examples and exercises.
45 min•By Priygop Team•Last updated: Feb 2026
Introduction to SELECT Queries & Filtering
In this section, we cover the fundamental aspects of select queries & filtering. You'll learn core concepts, see real-world examples, and understand how to apply them in your projects.
Key Concepts
- Understanding the core principles of select queries & filtering
- Practical applications and real-world use cases
- Step-by-step implementation guides
- Common patterns and best practices
- Tips for debugging and troubleshooting
- Performance optimization techniques
SELECT Queries & Filtering - Code Example
Example
-- SELECT with WHERE clause
SELECT first_name, last_name, email, salary
FROM employees
WHERE salary > 50000
AND department = 'Engineering'
ORDER BY salary DESC;
-- LIKE pattern matching
SELECT * FROM customers
WHERE email LIKE '%@gmail.com'
AND name LIKE 'J%';
-- IN and BETWEEN
SELECT product_name, price
FROM products
WHERE category IN ('Electronics', 'Books')
AND price BETWEEN 10 AND 100;Try It Yourself: SELECT Queries & Filtering
Try It Yourself: SELECT Queries & FilteringJavaScript⚠ 1 error
⚠ Syntax Issues (1)
✕
Line 1: JS Error: Unexpected identifier 'filtering'
💡 Check syntax near the highlighted line.
JavaScript Editor
✕ 1 errorTab = 2 spaces
JavaScript|11 lines|242 chars|1 error, 0 warnings
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