Web development has become a big industry from couple of decades. Now web development has very strong grip on technology, everything we see on internet is a web like YouTube, Facebook, Twitter etc..
Skills required for Web development
Web development is a complete universe it has a lot of branches for example frontend, backend, database.
For frontend web developer should have these skills.
There are many databases but some of them are very popular and commonly used databases one of them is MySQL it is very easy to use, if you are a beginner I personally suggest you to start with MySQL you will enjoy it.
I have 5+ years of experience in web development the knowledge I had I have written in very simple words, anyone can easily read it.