How can you learn database development online?

For an absolute beginner, W3Schools offers a great overview with examples that will provide you the base foundation to get you started and understand key concepts. Once you understand the basics, you can move onto HackerRank. This site offers real problems in scenario cases where you can test and develop your skills. Depending on the area of expertise, look for a certificate that will compliment existing skills and branch out from there. Sites like LinkedIn, Coursa and Goolge offers great certifications.

Learning database development online is an effective method. But first of all i learnt from a book and then I searched for some online methods such as w3schools . After that , I learnt from khan's academy and tried to solve many problems in hackerrank which was very helpful for me. Also, I learnt different optimization codes from my seniors.

Always been a great fan of the work that is done by freecodecamp.org, there are several complete & free courses on databases on their website.

Database courses offered on platforms such as Coursera and edX are very professional and usually cover the intermediate level of database development. You can then go to advance level by reading and understanding the documentation of particular RDBMS that you want to use.

Datacamp has an amazing collection of free online courses for absolute beginners. You can choose the Skill track of SQL Fundamentals that goes from Introduction to SQL to Data Analysis in SQL (PostgreSQL). However, the most important thing when learning something new from scratch is to have a main goal and a set of small and achievable mini objectives in order to be more consistent and not put it aside once things get hard and uncomfortable.

One thing I have also found helpful is attending seminars about data analysis and database , it helps to inspire a Beginner, and it will create more rooms for learning and networking

In the path to learn a new technology I don't miss to read the text books about that technology. It gives me detail understanding of basics, purpose, logic, and what type of problems that technology solves. When I get enough conceptual understanding of it then it's time for me to move on to hands on work.

I personally prefer paper based books or online books via a ebook reader in order to prevent distractions when one is online. Once someone has got a good level of fundamental understanding via the books as listed in the comment above, one can start to get a more hands on experience by writing SQL to interact with your favorite dbms systems, for example like postgres. Books that gives a more practical hands on understand will greatly help to validate the theory with practical examples. Books and online course that give more understanding across the complete spectrum of data from ingestion or analytics will also greatly help solidify the understanding of how data along with datastores are put in place in large scale modern applications.

It's a long path, a marathon and not a sprint. The basic free online courses are a great start. But nothing beats having a real simple question to ask, diving into the tables in your product, and piecing together a meaningful query, one small step at a time (each step sometimes requiring multiple Google searchines). It's a try/fail/fix type of learning for many of us. Look for a data dictionary or database reference guide for your product to get started after the basic SQL class.

There are many online SQL learning platforms that give you access to general databases through your browser for free. They also guide you through the queries of levels from beginner to intermediate. They are good starter because you neglect the effort to setup RDBMS locally in your PC and start learning SQL from day 1.

This is a great source for quick reference and quick understanding of a particular area or a set of concepts. The good thing about online tutorials, unlike books, is that the content is usually more structured and catered towards the viewer in a manner that it is more easier to understand. Often times good tutorials also include step by step instructions on how to go about building an small example or project, which gives a lot more understanding rather than while reading a book.

YouTube is a great source of tutorials and guided courses. Participating in a good forum/community can make your life easier and save so much time as well as exchanging experiences. Forums like stack overflow is a great beginning.

Learn what a "normalised" DB design is. Any relational DB you design (except for analytics), do it in the 3NF. It really comes down to 3 simple rules you need to follow. All available online, for free.

Nothing beats learning by doing aka Challenge Based Learning. Find a collaborative project online to join in on, learn from your pears and really struggle with the material until you get it. This will not only teach you the matter at hand (databases) but also using tools like ChatGPT and Google effectively to debug such technologies.

Write queries and practice, keep away from copy/paste as you start and do it yourself. Also understand the query syntax and logic inside it.

I will also add the following to the list of things to considers: - popular online talks from conferences. - publications from organizations like ieee, vldb. - industry seminars. - popular newsletters that covers deep database fundamentals and concepts. - popular technical podcasts and video logs take cover in depth technical details of dbms or data flow across a modern architecture in general.