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Что делает CONCAT в SQL?
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Вычисляет сумму булевых значений в столбцах, конкатенируя их
Удаляет дубликаты из результата запроса
Объединяет две или более строки в одну строку
Изменяет структуру таблицы, добавляя новый NULL-столбец
Конкатенирует столбец в базе данных
Заменяет значения NULL на заданное значение в столбцах
Сортирует строки в таблице в обратном порядке
Вычисляет среднее значение чисел в столбце
Изменяет тип данных столбца в таблице на дефолтный
Производит селективное объединение между двумя таблицами
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SQL для тестировщика Telegram | DID YOU KNOW?

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Telegram Gives Up On Crypto Blockchain Project

Durov said on his Telegram channel today that the two and a half year blockchain and crypto project has been put to sleep. Ironically, after leaving Russia because the government wanted his encryption keys to his social media firm, Durov’s cryptocurrency idea lost steam because of a U.S. court. “The technology we created allowed for an open, free, decentralized exchange of value and ideas. TON had the potential to revolutionize how people store and transfer funds and information,” he wrote on his channel. “Unfortunately, a U.S. court stopped TON from happening.”

What is Telegram?

Telegram’s stand out feature is its encryption scheme that keeps messages and media secure in transit. The scheme is known as MTProto and is based on 256-bit AES encryption, RSA encryption, and Diffie-Hellman key exchange. The result of this complicated and technical-sounding jargon? A messaging service that claims to keep your data safe.Why do we say claims? When dealing with security, you always want to leave room for scrutiny, and a few cryptography experts have criticized the system. Overall, any level of encryption is better than none, but a level of discretion should always be observed with any online connected system, even Telegram.

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Telegram SQL для тестировщика
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