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Использование предложения NOT IN в SQL может привести к неожиданным ошибкам, если подзапрос содержит значения NULL. Это происходит, поскольку предложение NOT IN оценивает условия с помощью оператора AND, что приводит к результатам UNKNOWN при наличии значений NULL. Чтобы избежать этой проблемы, отфильтруйте значения NULL в подзапросе или используйте Anti Joins в качестве альтернативы.

https://blog.dailydoseofds.com/p/use-sql-not-in-with-caution

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Использование предложения NOT IN в SQL может привести к неожиданным ошибкам, если подзапрос содержит значения NULL. Это происходит, поскольку предложение NOT IN оценивает условия с помощью оператора AND, что приводит к результатам UNKNOWN при наличии значений NULL. Чтобы избежать этой проблемы, отфильтруйте значения NULL в подзапросе или используйте Anti Joins в качестве альтернативы.

https://blog.dailydoseofds.com/p/use-sql-not-in-with-caution
Dailydoseofds
Use SQL "NOT IN" With Caution
An unexpected error that can take hours to debug.
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Telegram Desktop App Not Working on Windows?

Whitelist Telegram in Windows Firewall

When enabling the VPN, changing the location on the VPN, or disabling it does not work as expected, continue with the rest of the fixes. The Windows Firewall protects your computer from viruses by blocking programs and apps from untrusted sources. In some cases, it can also affect the functioning of everyday apps like Telegram. Therefore, it is imperative to ensure that the Firewall doesn't block Telegram. You can do this by whitelisting Telegram in your Firewall settings. To do that, follow these steps: Open the Windows Control Panel. Go to Windows Defender Firewall. Click on Allow an app or feature through Windows Defender Firewall. Windows Defender Firewall Settings in Windows 10 Control Panel Check the Public and Private boxes for the Telegram app in the list. You may need to manually add Telegram if it isn't there already. To do that, click on Change settings in the Allowed apps window. Click on Allow another app... and copy the path to the folder where Telegram is installed, or browse to it. Then click Add. Don't forget to check the Public and Private boxes after adding the app to the list of allowed apps.

Использование предложения NOT IN в SQL может привести к неожиданным ошибкам

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