#посмотреть
▫️Условия задачи
▫️Создание таблицы для экспериментов в PostgreSQL
▫️Объединение таблицы с самой собой (SELF JOIN)
▫️Записываем условие фильтрации
▫️Проверка решения на Leetcode
BY SQL для тестировщика
Launched in 2013, Telegram allows users to broadcast messages to a following via “channels”, or create public and private groups that are simple for others to access. Users can also send and receive large data files, including text and zip files, directly via the app.The platform said it has more than 500m active users, and topped 1bn downloads in August, according to data from SensorTower.
Telegram is riding high, adding tens of million of users this year. Now the bill is coming due.Telegram is one of the few significant social-media challengers to Facebook Inc., FB -1.90% on a trajectory toward one billion users active each month by the end of 2022, up from roughly 550 million today.
SQL для тестировщика from ru