Now that we got data from MongoDB and loaded into Postgres with some transformation, let’s put the data back into MongoDB. This post is the continuation of the previous post about ingesting data from MongoDB. You should totally start from How to Ingest Data From MongoDB with Node.js. The aim …

Data ingestion from a NoSQL database often involves the denormalisation of their schema-less data before loading into a relational database. In this post, we will try to grab the restaurant data from MongoDB, denormalise the collection into a parent and a child table, and load them into Postgres. This exercise …

In the last post, we built AlexNet with Keras. This is the second part of AlexNet building. Let’s rewrite the Keras code from the previous post (see Building AlexNet with Keras) with TensorFlow and run it in AWS SageMaker instead of the local machine. AlexNet is in fact too heavy …

As the legend goes, the deep learning networks created by Alex Krizhevsky, Geoffrey Hinton and Ilya Sutskever (now largely know as AlexNet) blew everyone out of the water and won Image Classification Challenge (ILSVRC) in 2012. This heralded the new era of deep learning. AlexNet is the most influential modern …

TensorFlow offers both high- and low-level APIs for Deep Learning. Coding in TensorFlow is slightly different from other machine learning frameworks. You first need to define the variables and architectures. This is because the entire code is executed outside of Python with C++ and the python code itself is just …

The most basic neural network architecture in deep learning is the dense neural networks consisting of dense layers (a.k.a. fully-connected layers). In this layer, all the inputs and outputs are connected to all the neurons in each layer. Keras is the high-level APIs that runs on TensorFlow (and CNTK or …

Once you get your head around MongoDB CRUD operations with Mongo Shell, getting Node.js to do them becomes easy. If you are still not confident with MongoDB, check out MongoDB skills essentials exercise to brush up your MongoDB skills. We will create a collection called, students. Then, we will insert …

In MongoDB, the primary key is reserved for the _id field. This is a system field and gets created by default when inserting new records. When you want to enforce the uniqueness in other fields, you can use unique index. Here is how to create unique index with Mongo Shell. …

MongoDB is probably the most prevalent NoSQL database choice for the backend of web applications. It is an open source and relatively easy to use. It works well with the modern web applications written in Node.js or Python Django. Enterprise-level web application platforms like Sitecore (works on .NET) also use …

MongoDB does not have authentication out of box. When you install it, the first thing you have to do is to create an admin user in the admin database and enable authentication. After installation, you can get into MongoDB with the mongo command from the Mongo Shell. mongo Let’s create …