Lección 3 de 9
WHERE y operadores
La cláusula WHERE filtra resultados. Usa operadores como =, !=, <>, >, <, >= y <=. Combina condiciones con AND y OR.
SQL
SELECT * FROM users WHERE age >= 18;
SELECT * FROM products WHERE price < 50;
SELECT * FROM users
WHERE country = 'Denmark' AND age > 25;
SELECT * FROM orders
WHERE status = 'pending' OR status = 'processing';