SQL, or Structured Query Language, is an essential tool for any developers who are coding in any computer language. IT is used to modify data in a database or search and retrieve data from one. You can use my web page for practice.
About Author
Currently, I work as a software quality engineer and web developer and live in the USA. I do both: front-end and the back-end development. On the back-end, I use PHP and Oracle. This is why I wrote eBooks about programming in PHP and SQL. My first computer language was Visual Basic. I learned it in 1996. At the same time, I started attending Borough of Manhattan Community College. My major was Computer Science. At BMCC, I learned C++, assembly language and Java. I like computer programming, but my first passion was neurophysiology, which I studied and taught for more than ten years. My way of thinking, probably, is different from that of other programmers, and because of that, my books about programming are a little different. When I started learning computer programming, by reading books, I noticed that many authors are missing the very beginning. Imagine, that you are at a gas station in the middle of an unknown city and you are asking a guy for direction to the city "N". He answers, "Take I-95 north, then take exit 73". His explanation is clear, but you cannot start driving anyway because ... he did not tell you how to get to the I-95 north. This is the problem with many books about computer programming. In my books, I always tell my readers how to get to the point from where they have to "start driving". To be successful in computer programming, you don't have to have the mind of a mathematician. If you can rearrange boxes in your garage in such a way that there will be available space for your car, then you can be a computer programmer. :)