PostgreSQL — Select

Basic Select

SELECT * FROM users;
SELECT name, email FROM users;

With Conditions

SELECT * FROM users WHERE id = 1;
SELECT * FROM users WHERE active = true;

Ordering

SELECT * FROM users ORDER BY name ASC;
SELECT * FROM users ORDER BY created_at DESC;

Limiting

SELECT * FROM users LIMIT 10;
SELECT * FROM users LIMIT 10 OFFSET 20;

Aliases

SELECT name AS full_name FROM users;
SELECT u.name FROM users AS u;

Distinct

SELECT DISTINCT country FROM users;

Aggregate Functions

SELECT COUNT(*) FROM users;
SELECT AVG(age) FROM users;
SELECT MAX(price) FROM products;
SELECT MIN(price) FROM products;
SELECT SUM(total) FROM orders;

Mini Practice

Select all columns
Select specific columns
Filter with WHERE
Order results

Up Next

Continue with Where — filtering results.

Frequently Asked Questions about Select

What is Select in PostgreSQL?

Select is a fundamental concept in PostgreSQL. This lesson explains it step by step with clear examples, making it easy for beginners to understand.

How do I learn Select?

Start by reading the explanation above, then try the code examples. Practice by modifying the examples and experimenting with different values. Hands-on practice is the best way to learn Select.

Why is Select important in PostgreSQL?

Select is essential for PostgreSQL development. Understanding this concept will help you write better code and solve real-world problems more effectively.