Click here to Skip to main content

Submit your article

NoSQL

NoSQL

Great Reads

TmStorage, Open-source Storage Engine for .NET

by Tomaz Koritnik

TmStorage is a structureless virtual file system from which complex storages or databases can be built.

Aggregation in MongoDB

by Vikas Sharma

In this article, we will focus on aggregation pipeline. I'll try to cover each major section of it using simple examples. We will be writing mongo shell commands to perform aggregation.

Introduction to NoSQL and Polyglot Persistence

by Nikola M. Živković

Introduction to NoSQL and Polyglot Persistence

Using C++ to Simplify the Extensible Storage Engine (ESE) API - Part 1

by Espen Harlinn

Easy to use C++ wrapper classes for the Extensible Storage Engine (ESE) C API

Latest Articles

News Track - News Aggregator

by Gerard Castelló Viader

A news tracking or news aggregator website that allows users to share content they find on the Internet and give it certain visibility

NoSQL or not NoSQL?

by Daniele Fontani

That is the question. A comparison between these two technologies and some tips to choose the best that suits your needs.

metastrings: A Simple File-based Dynamic NoSQL Database

by Michael Sydney Balloni

Learn about the inner workings of a dynamic database, and how SQLite is a great fit

An Ultrafast Light Timeseries Storage Engine – LMDB Part 1

by Espen Harlinn

A lightweight timeseries storage engine, capable of storing millions of timeseries values per second

All Articles

NoSQL

Get data for each subcollection for each document of a collection in firebase

14 Jul 2022 by kkongkk

I have a fitness dashboard to show activity of users. However the way the database is structured has made this difficult.{collection/document/subcollection/document} Currently the dashboard does show each user and all the information (i.e....

Get data for each subcollection for each document of a collection in firebase

14 Jul 2022 by Gerry Schmitz

Bad design leads to bad code. There is no logical reason to create a "subcollection" simply because someone works out more than once in a day. You have a workout for a give date and time by person x. You want to total by day, week, etc. it's...

News Track - News Aggregator

1 Jul 2022 by Gerard Castelló Viader

A news tracking or news aggregator website that allows users to share content they find on the Internet and give it certain visibility

Troubles with making a favorite page with hive DB flutter

5 May 2022 by Member 15625382

Hello everyone here's my test app and I have some problems with making a Favorite page section where you can tap on button and add the item into fav page. I'm receiving a data from API and implementing it by Listview.builder In main.dart, I'm...

Best way on storing and retrieving data from a nosql database like firestore

20 Apr 2022 by nSv.23

I am developing a personal ledger web/mobile app using Vue3 with Quasar, Pinia and vue router and Firebase for backend. I am in confusion on how to save the transactions on the Firebase's firestore cloud. I have the following possible ways of...

NoSQL or not NoSQL?

9 Nov 2021 by Daniele Fontani

That is the question. A comparison between these two technologies and some tips to choose the best that suits your needs.

metastrings: A Simple File-based Dynamic NoSQL Database

9 Aug 2021 by Michael Sydney Balloni

Learn about the inner workings of a dynamic database, and how SQLite is a great fit

'Documentreference' object has no attribute 'push'

29 Apr 2021 by Member 15053137

I'm writing an app in Python that used Firestore/Firebase! I've got the database all set up. Now I've managed to add an account number into the database see below. Now each time the program runs it just writes over the already added account...

An Ultrafast Light Timeseries Storage Engine – LMDB Part 1

23 Mar 2021 by Espen Harlinn

A lightweight timeseries storage engine, capable of storing millions of timeseries values per second

Set count for custom months in a year with the value of existed month to gather data

12 Jan 2021 by cgprakash

Hi, I need to retrieve data from MySQL tables and to retrieve as follows: ['Years', 'January', 'February', 'March','April','May', 'June','July', 'August', 'September','October','November','December',{ role: 'annotation' }], ['2012', 10, 24, 20,...

Set count for custom months in a year with the value of existed month to gather data

12 Jan 2021 by Richard Deeming

Something like this should work: SELECT Years.`Year`, (SELECT COUNT(1) FROM YourTable As m WHERE Year(m.join_date) = Years.`Year` And Month(m.join_date) = 1) As `Jan`, (SELECT COUNT(1) FROM YourTable As m WHERE Year(m.join_date) =...

Set count for custom months in a year with the value of existed month to gather data

9 Jan 2021 by Gerry Schmitz

You've given a list of requirements; and no work. Perhaps start by "learning SQL"; so you can "query" how many joined for a given year and month. Then you "pivot" the results; adding little vertical bars between the results as "delimiters" ......

Best way to store data from irregular tables in database

8 Dec 2020 by RickZeeland

Take a look at: Graph database - Wikipedia[^] And a listing here: graph-databases[^]

How should I get started with nosql databases ?

1 Oct 2020 by deepeshdm3434

I have previously worked with Relational databases and they are pretty much very easy to implement. Recently I got curious about Nosql databases. But I have no idea how I should get started with ? I as far as I have researched there are 4 types...

Using C++ to Simplify the Extensible Storage Engine (ESE) API - Part 2

1 Sep 2020 by Espen Harlinn

An Implementation of a Database layer using my C++ wrapper classes for the ESE C API

Using C++ to Simplify the Extensible Storage Engine (ESE) API - Part 1

30 Aug 2020 by Espen Harlinn

Easy to use C++ wrapper classes for the Extensible Storage Engine (ESE) C API

How do I create variable model in django?

8 Jun 2020 by Prakash Yogi

I am developing a quiz making website in Django where users can generate quiz with n numbers of questions where questions can be of different type(MCQ,text etc.). How can I create a model for it so that users can generate questions (of any amount...

How do I create database model for a chat application? Should I use SQL or nosql?

9 May 2020 by RickZeeland

It depends, if you want to make a real-time chat application usually there is no database at all. Read more about it here: simple-chat-app-using-django-channel-ed5032b79b9c[^] If you want to use a database, PostgreSQL is a good choice, see: ...

How do I create database model for a chat application? Should I use SQL or nosql?

9 May 2020 by Prakash Yogi

I am creating an application like facebook which would have features like posting, chatting,adding stories etc. I am using Django for it. I am confused over choice of databases(sql or nosql) and over ther database models. I am Django's default...

Cosmosdb filtering over generic type (object)

5 Mar 2020 by Member 14637786

Hello, I have quite unique situation to handle (I guess). So the scenario is that I have a CosmosDb and a model of data looking like this: { "deviceId": "exampleId", "properties": [ { "name": "temperature", "value": 20 }, {...

Using LINQ to Query Dynamic Schema-less Cosmos DB Documents

21 Nov 2019 by Jeremy Likness

A look at the latest Azure SDKs for .NET with a sample .NET Core app that uses the Cosmos DB SDK and LINQ to iterate over documents with a dynamic schema.

Cachalot DB - Very Fast Transactional Database for .NET Applications - Part 2

16 Apr 2019 by Dan Ionescu (USINESOFT)

More on data manipulation

Migrate Data from SQL Server to Azure Cosmos DB

8 Nov 2018 by Srinivasa Dinesh Parupalli

Importing Documents from SQL Server to Azure Cosmos DB

Beginners' guide to using MongoDB 4.0.2 and the official C# driver

16 Sep 2018 by George Swan

Highlights the latest developments in both the Mongo open-source document database and the open-source official C# driver.

What the Shard? Partitioning Azure Cosmos DB with the Mongo DB .NET Driver

3 Aug 2018 by Jeremy Likness

Learn how to partition collections using the C# MongoDB driver with Azure Cosmos DB

What Can JSON Do For You in SQL Server Database?

13 Jul 2018 by Jovan Popovic(MSFT)

Learn about various use cases how you can leverage JSON support in SQL Server and Azure SQL Database

Professional Application Development in MEAN Stack - Part 2

16 Mar 2018 by Yaseer Mumtaz

After setting up the basic development environment, let's create the master/layout and home page

Movable Globally Distributed System with Database

7 Nov 2017 by Bruce Yang CL

A distributed system architecture, mobile devices around the world, free charge to construct your global application

LiteDB - A .NET NoSQL Document Store in a Single Data File

18 Oct 2017 by Mauricio David

Simple, fast and free embedded .NET NoSQL Document Store in single data file

Introduction to NoSQL and Polyglot Persistence

16 Oct 2017 by Nikola M. Živković

Introduction to NoSQL and Polyglot Persistence

NoSQL - Second Generation Database

16 Aug 2017 by adriancs

An introduction of Unstructured Data or Document Database

Aggregation in MongoDB

27 Oct 2016 by Vikas Sharma

In this article, we will focus on aggregation pipeline. I'll try to cover each major section of it using simple examples. We will be writing mongo shell commands to perform aggregation.

How complicated can a search be?

28 Jul 2016 by Mihail Mateev

Cloudant distributed database as aservice (DBaaS) is engineered in a way to help you solve issues with indexingand searching by integrating the Apache Lucene search library.

product-showcase

Getting Started with Cloudant

9 Jun 2016 by Mihail Mateev

Cloudant is a NoSQL database as a service (DBaaS) built from the ground up to scale globally, running non-stop, and handling a wide variety of data types.

product-showcase

An Abstract Generic DAO for RavenDB

26 Feb 2016 by Ranjan.D

Abstract and generic DAO for RavenDB

Cassandra on Windows in Angular MVC API Based Application

23 Feb 2016 by otark777

Some thoughts about one page Angular site based on ASP.NET Web API 2 and Cassandra NOSQL database

NoSQL: MongoDB for Beginners

21 Feb 2016 by adityaswami89

NoSQL: MongoDB for beginners

High Performance Search using MongoDB and ASP.NET MVC

29 Dec 2015 by Peter Carrasco

High Performance search using MongoDB and ASP.NET MVC

Data modelling tool for cassandra

28 Dec 2015 by Kornfeld Eliyahu Peter

I do not know about open-source, but as much as I understand KDM[^] is at least free...(Why open-source by the way?)

open source tool for data dictionary creator for Cassandra.

28 Dec 2015 by Kornfeld Eliyahu Peter

That page definitely states that the tool is for SQL Server - that is Microsoft...

Data modelling tool for cassandra

28 Dec 2015 by vamsi.welcome

we are using datastax - data modeling tool for Cassandra database. As an advancement I'm looking a data modeling tool(open source) which facilitate generate script for DDL operations like sql server management studio/TOAD. Please suggest me a tool which has this feature for Cassandra database.

open source tool for data dictionary creator for Cassandra.

28 Dec 2015 by vamsi.welcome

I'm looking for an open source software tool for generating data dictionary for Cassandra database. So far in my search I found 'Data Dictionary Tool' (which is open source but not sure if it supports 'NoSql' databases.Data Dictionary Creator - Home[^]Need your inputs on this.

Why theory CAP in mongodb (CP) and Cassandra (Ap) and rdbms (CA)?

14 Dec 2015 by log98

According to the picture: 1. Why is Mongodb,...(CP) 2. Why is CouchDB,..(AP) 3. Why is Rdbms (CA)Note: Why Rdbms system partition tolerance does not matter? picture thanks

Friday the 13th - JSON is Coming to SQL Server

8 Dec 2015 by Jovan Popovic(MSFT)

Overview of built-in support for JSON text processing in new SQL Server

MEAN Stack Beginner Tutorial

9 Nov 2015 by nomi ali

In this article we learn MEAN Stack a combination of open source JavaScript framework. How they work and How can create a single page application using these technologies. We use these JavaScript technologies not only on front end but also on the back end.

Evolution of Data Objects Within Database Applications

27 Oct 2015 by Alexander Imas

The subject of this article is database applications. These applications reflect objects from the real world in program objects in the application.

How do I connect to MongoDB from a PLC using Structured Text (IEC 61131-3)?

18 Oct 2015 by Arjunitedred

Hello everyone,How do I send data from a PLC (Bosch Indraworks) to MongoDB and what function blocks would be required for the same? I looked up on RIL_SocketComm.library and none of them are compatible for MongoDB. It would really mean a lot if anyone could help me with this.Thanks.

LiteDB - A .NET NoSQL Document Store in a Single Data File

14 Oct 2015 by Terence Wallace

Alternative VB.NET version of "LiteDB - A .NET NoSQL Document Store in a single data file"

How to write mongoDB query to sum up elements in an array that match another array?

29 Sep 2015 by Ivan.0

In my mongoDB dbs there is a collection A1 that has an array of embedded objects B. I want to group all elements in A1 by the sum of a certain field of B in the array field of A1,namely X. Meanwhile the value of X field need to be an element in another collection A2. That's to say I need to sum...

How Binary XML Simplifies Database and Protocol Design

21 Sep 2015 by Lao Chen

A lightweight method to process binary XML. As a general data representation technique, it simplifies the design of database and protocol with convenience.

MEAN web development #7: MongoDB and Mongoose

7 Sep 2015 by Sander Rossel

The seventh in a series on MEAN web development.

could someone provide links to mongodb projects?

15 Jun 2015 by Krunal Rohit

Hey,This isn't how it works. We're not here to google for you. You can google this simple thing by yourself.After getting the proper project, if you stuck somewhere then let us know, we'd help you but not this way.Hope I'm clear to you.-KR

could someone provide links to mongodb projects?

15 Jun 2015 by Member 11768790

i am new to mongodb and want to work on a project,but i cant find any good source for projects so please answer some good links..

Hands-on: Build a Node.js-powered chatroom web app | Part 3

19 May 2015 by Rami Sayar

In this installment, I will show you how to use your existing express-based Node.js app to create a chatroom backend with WebSocket support.

Choosing MySQL or NoSQL Database For My Scenario

11 May 2015 by bilal78699

Hello All,I have a scenario where i have to store timesheets of different projects. The object graph is like this:Timesheet->Project->UserA user can create multiple projects. And a project can have multiple timesheets. So in my scenario it is expected that timesheet data will grow...

How can I save image into Cloudant ?

29 Apr 2015 by M-osab

Hello, I want to save image into Nosql DB Cloudant.I am working with c#.thanks.

haw to get data from Cloudant (json document)

22 Apr 2015 by Sergey Alexandrovich Kryukov

One way of working with JSON in .NET would be using Data Contract: deseralize a json string array[^].If this is not JSON created in .NET using Data Contract, it still could be possible to create a contract matching the data structure. In all cases, you will need a comprehensive description...

haw to get data from Cloudant (json document)

22 Apr 2015 by M-osab

Hello, I am working with asp.net, c#database : cloudant I have data in cloudant in Json Format, I want to get data from cloudant,for exmeple : when I create a profil, data will saved in cloudant, in the next page I want to go to profil_view.aspx where I can appear this data.sorry my...

Removing documents from a collection in Mongodb

12 Apr 2015 by ColdskyXia

How to remove documents from a collection more efficiently

Adding new documents to a collection in Mongodb

12 Apr 2015 by ColdskyXia

How to add new documents to a collection more efficiently

A First Look at NoSQL and MongoDB in Particular

16 Mar 2015 by Sander Rossel

Getting your feet wet in NoSQL with MongoDB!

Solve Mongo DB Element Does Not Match Any Field or Property of Class

15 Mar 2015 by Shahriar Iqbal Chowdhury/Galib

Solve Mongo DB Element does not match any field or property of class

Event Sourcing Overview

5 Mar 2015 by Duncan Edwards Jones

An introduction to Event Sourcing for the relational database savvy developer

Implementing Joins in Hadoop Map-Reduce

29 Jan 2015 by Suffyan Asad

How to implement Joins in Hadoop Map-Reduce applications during Reduce and Map phases

Chat Application Using Firebase, Javascript

15 Dec 2014 by Arlen Navasartian

This is a simple example of a web based chat application implemented using Firebase.

TmStorage, Open-source Storage Engine for .NET

21 Nov 2014 by Tomaz Koritnik

TmStorage is a structureless virtual file system from which complex storages or databases can be built.

Connect MongoDB from Any Working Directory on ubuntu

4 Nov 2014 by binit.ku.singh

Connect MongoDB from any working directory on ubuntu

Semantic Database: Concept, Architecture and Implementation

25 Oct 2014 by Marc Clifton

No word has a value that can be identified independently of what else is in its vicinity.

Basics of MongoDB

12 Oct 2014 by binit.ku.singh

MongoDB was designed from the beginning to scale out. Its document-oriented data model allows it to automatically split up data across multiple servers.

Implementing Custom ASP.NET State Management using Redis and ASP.Net MVC5 – Part 1

10 Oct 2014 by Mathew Soji

A walkthrough on installing Redis server and implementing a custom ASP.NET State Management using Redis and ASP.NET MVC5.

Good web app framework backend for mobile SPA using REST/JSON and a NoSQL DB?

3 Sep 2014 by canam2

In researching technologies for development of a single-page web application (SPA) for mobile deployment, I am trying to determine a good backend web application framework to use.I like the idea of using a NoSQL DB with a clean REST/JSON API and plan to use an client-side MVC framework like...

web_development

Northwind Database with NoSQL DBreeze

22 Jul 2014 by Pradip Koli

Using NoSQL DBreeze database with ASP.NET on SQL Northwind Database.

MongoDB Hadoop Hortonworks in Windows Server 2008

11 Jul 2014 by LM Heah

MongoDB Hadoop Hortonworks in Windows Server 2008

Any tool providing NoSQL (MongoDB) Data Provider

9 Jun 2014 by Suvabrata Roy

Hi,How to install Mongo DB on Amazon EC2: https://mongodb-documentation.readthedocs.org/en/latest/ecosystem/tutorial/install-mongodb-on-amazon-ec2.html[^]Mongo DB drivers : http://docs.mongodb.org/ecosystem/drivers/[^]Mongo DB use case :...