What is a transaction? In short, a transaction is a group of database tasks that are treated as a single unit of work. Either you have the transaction or no transaction. Remember the song: “all or nothing” by O-town? That’s the spirit! What is ACID? You often hear this database is ACID-compliant, but that database … Read more
MongoDB Index fundamentals If you have ever worked with any database (SQL or NoSQL), you probably know that the purpose of creating indexes is to speed up the queries at the cost of create/update/delete operations. MongoDB is no exception. MongoDB uses B-Tree as indexes’ data structure. This data structure offers fast queries. However, since the … Read more
Importing sample data This post is a quick introduction to the MongoDB Aggregation Framework. It’s a part of a mini-series called Mongo DB Cheatsheets To follow the tutorial, you need to import the following data: This sample is a list of 5 rich people from two families. The data contains their net worth and their … Read more
If you have been doing software development for some time, you’d probably know what CRUD is. CRUD stands for CREATE-READ-UPDATE-DELETE. Those are the day to day task we do on databases, regardless of their types. Let’s get started by using a new database. As you may remember from the previous post, there is no “create” … Read more
This tutorial helps you quickly setup a MongoDB instance so you can start learning this topic right away. We are going to use MongoDB 5 in this series. I haven’t tested with other versions so if you are from the past or the future, make sure you use the correct version as in this post. … Read more