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SQL

SQL Aliases

Rename columns/tables in queries with AS aliases.

SQL Aliases — a practical guide to SQL aliases AS with clear examples you can reuse in real projects.

SQL Tutorial Series (40/100). Prefer one article? Read the complete SQL tutorial.

Short description

Aliases improve readability and are required for derived tables in many engines.

Aliases

SELECT u.email AS user_email, COUNT(o.id) AS order_count
FROM users AS u
LEFT JOIN orders AS o ON o.user_id = u.id
GROUP BY u.email;

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