Hello everyone... Here I am back... Today we are going to discuss a BIG topic. As a fresher IT student when learning Database systems for the first time, I was thinking of how these database tables querying at Facebook. If they use these ER diagrams for such a massive amount of data how actually that ER diagram will look like. One day I found an interesting topic while I hanging around on Youtube. Its NoSQL. Actually for the first time I just thought it was like MySQL, SQLite another relational database tool. But simultaneously I had figure out NoSQL is the opposite of RDB. Here... Today's topic is NoSQL, beyond tabular relations. Fellas who heard the word "NoSQL" for the first time and who dismiss from the mind can find thousand of details of the NoSQL and RDB on youtube. or I will mention the video I had watched in the early days. NoSQL stands for "Not only SQL" . See? It doesn't require schemas or tables at all. It is used to handle a massive amoun