Readable temporary name।

SELECT
    SUM(amount) AS total_revenue
FROM orders;

Table Alias

SELECT
    o.order_id,
    u.name
FROM orders AS o
JOIN users AS u
    ON o.user_id = u.user_id;

orders বারবার না লিখে o।

users এর বদলে u।

Complex query অনেক readable হয়।