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SQL Reference

Structured Query Language used for managing and manipulating relational databases. Essential syntax and code samples for professional development.

Select

SELECT * FROM users WHERE active = 1;

Insert

INSERT INTO users (name, age) VALUES ("Dev", 25);

Update

UPDATE users SET status = "admin" WHERE id = 1;

Delete

DELETE FROM logs WHERE created_at < "2024-01-01";

Joins

SELECT * FROM users JOIN posts ON users.id = posts.user_id;

Aggregates

SELECT COUNT(*), SUM(price) FROM orders;