Firstly, welcome to the forums.
While we are primarily here to help people with their Free Code Camp progress, we are open to people on other paths, too. Some of what you are asking is pretty trivial in the Free Code Camp contex.
With your current questions (or lack of), we don’t have enough context to know what you already know or don’t know, so it is impossible to guide you without just telling you the answer (which we won’t do).
It is pretty typical on here for people to share a codepen / repl.it / jsfiddle example of what they have tried so that anyone helping has more of an idea of what help is actually helpful.
Please provide some example of what you’ve tried and I’m sure you’ll get more help.
Happy coding 
It it for the YouTube SQL Tutorial?
I assume you have to connect to your own DB and not use the sample DB.
yes, it’s related to the free course. I’m a beginner and not sure how to fix it, can you please help?
Hi, I am a beginner and do not know much yet. Can you please help?
Did you skip the setup part of the video? It shows you how to install and connect to the DB at the one-hour mark.
yes, it’s for the youtube tutorial. How do connect my own DB?
It shows you in the video. Also, the site has docs.
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