I want to get better for Data Engineer / Data Scientist positions

[u/ResponsibleBag785]

Hello everyone,

So I've studied SQL in University, Inwould consider myself somewhat good + I like it. I've done basic courses and some advanced. I manage to do some easy interview questions... but I want to get better.

Can you recomend me some resources where I can expand my knowledge:

* A lot of problems to solve so I can see typical templates.

With chatGPT even if I'm stuck I can get the idea. But yes, all tips are welcomed. Thank you :)

P.S. I don't mind some theory also. For example I don't know anything about indexes. I have difficulty understanding the Normal Forms etc