Spring Data JPA разбирает имена методов репозитория и автоматически генерирует JPQL-запросы. Метод findByEmailAndAgeGreaterThan(String email, int age) создаёт SELECT u FROM User u WHERE u.email = ?1 AND u.age > ?2 без какой-либо конфигурации. Это покрывает большинство простых запросов.
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