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Lillian Hart

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NOT IN vs NOT EXISTS

At first glance, NOT IN and NOT EXISTS might seem to do the same thing—they both filter out rows based on some condition in a subquery. But under the hood, they behave quite differently, and choosing the right one can save you from some tricky bugs and performance issues. NOT INSELECT * FROM employees WHERE…

SQL Server

Answered Jun 25, 2025 · 771 Views Read answer →

Why am I getting a malformed packet error when using tcpdump?

The reason for malformed packets could be a broken network connection, out of range wifi signal or even a DDoS attack for example. Another thing, to avoid problems with .pcap or .cap files, why not save it to a .txt file? Here is a sample command to save data onto a text file: tcpdump -X -vv -i eth0 > tcplog.txt Also…

Cyber Security

Answered Oct 20, 2022 · 1.2K Views Read answer →

What should I choose between java sdl, sfml, opengl, etc.

If you're fairly new to game programming and programming in general, I recommend against starting out learning everything in C++. Either set your sights lower than sprite-based games while you learn C++, java sdl (e.g., practice with a text adventure while you get comfortable with the language) or go for the less…

Java

Answered Oct 10, 2022 · 1.3K Views Read answer →

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