You should know how to handle problems, most of the companies want developers who can found solutions of a problem in the most efficient way, for example you can write "hello world" 10 times or you can use a loop that are the traits which a good developer should possess. Now to become a web developer you should know. 1-HTML 2-CSS 3-one client side language 4-one Server side language

U can simply copy the json content using file_get_contents('xyz.json') And then decode the file contents using json_decode() and insert them into database using mysqli