Практикум. Обрабатываем результаты и делаем сложные запросы
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Здесь:
▫️Подсчет строк в результате запроса COUNT
▫️Оператор GROUP BY
▫️Оператор HAVING
▫️Джойны и алиасы
▫️UPDATE данных
▫️Представления (views)
▫️Хранимые процедуры
▫️Триггеры SQL
BY SQL для тестировщика
In recent times, Telegram has gained a lot of popularity because of the controversy over WhatsApp’s new privacy policy. In January 2021, Telegram was the most downloaded app worldwide and crossed 500 million monthly active users. And with so many active users on the app, people might get messages in bulk from a group or a channel that can be a little irritating. So to get rid of the same, you can mute groups, chats, and channels on Telegram just like WhatsApp. You can mute notifications for one hour, eight hours, or two days, or you can disable notifications forever.
At a time when the Indian stock market is peaking and has rallied immensely compared to global markets, there are companies that have not performed in the last 10 years. These are definitely a minor portion of the market considering there are hundreds of stocks that have turned multibagger since 2020. What went wrong with these stocks? Reasons vary from corporate governance, sectoral weakness, company specific and so on. But the more important question is, are these stocks worth buying?
SQL для тестировщика from id