Hire the best NoSQL developers

Check out NoSQL developers with the skills you need for your next job.

Clients rate NoSQL developers
Rating is 4.8 out of 5.
4.8/5
based on 268 client reviews
Upendra Pratap K.
$40/hr
  • Trophy Icon NoSQL
  • Python
  • Django
  • React
  • MySQL
  • Flask
  • Elasticsearch
  • Scrapy
  • Ecommerce Website
  • Web Application
  • NoSQL Database
  • RESTful Architecture
  • Data Scraping
  • Software Architecture & Design
  • JavaScript
  • Python Script

⭐⭐⭐⭐⭐ Top Rated Plus ✌ ✅ Python ✅ Django I'm an Expert Python Developer with more than 10+ years of experience in web development. ✅ Specialized as a Python & Django developer. ✅ Highly proficient in Flask, SQL, Scrapy, Html, Javascript, and React. ✅ Looking for 🌟 long-term work 🌟. I like building scalable and clean backend architecture. I will be happy to create a product for you with Python, Django/Django Rest Framework, Flask and any other Python-based technology on the backend and React/Redux on the frontend Backend skills: * Python 2.7/3.x (DRF, Scrapy, Celery, Channels) * MVC Frameworks: Django, Flask, Tornado * Relational...

Myroslav T.
$42/hr
  • Trophy Icon NoSQL
  • Java
  • Spring Framework
  • Hibernate
  • AngularJS
  • REST
  • SQL
  • JavaScript
  • HTML
  • MongoDB

I am a developer with 7 years of commercial experience in developing back-end web projects from scratch, using Java/J2EE technology stacks. April 2019 - present Senior Sorftware Engineer at Upwork The product for connecting and collaborating businesses and independent professionals remotely. Technologies stack: Java 8, Dropwizard, Google Guice, DynamoDB, PostgreSQL, Hystrix, ElasticSearch, Kibana, Kafka, AWS Lambda, JUnit, Jenkins, Docker, Maven, Git November 2018 - April 2019 Software Engineer at Binariks The product which provides a global SaaS platform for Account Based Marketing (ABM) to help B2B companies improve sales with...

Anton T.
$30/hr
  • Trophy Icon NoSQL
  • Node.js
  • JavaScript
  • Koa
  • ExpressJS
  • Sails.js
  • hapi
  • REST
  • JSON

Hello, I'm Anton from Russia! I'm a developer on Node.js for 5 years now. I am engaged in the creation of services and micro-services, specializing in the development of various dashboards, using tools to create excel/pdf files and charts of varying degrees of complexity. Using frameworks and libraries, I have all the necessary skills on frontend for similar tasks, so I'll be glad to receive orders, including for projects entirely. My skills in: • Node.js frameworks: Express.js, Koa2.js, Sails.js • Frontend frameworks: Vue.js, Webix Jet If you have read this far, then you are interested in my profile. Then you should know that when you...

Mallat M.
$25/hr
  • Trophy Icon NoSQL
  • Technical Editing
  • MongoDB
  • Angular
  • Node.js
  • SQL
  • NoSQL Database
  • Solidity
  • React
  • HTML
  • CSS

I'm a Full-stack/blockchain JavaScript Developer with a little Back-End expertise. I'm passionate about the field of web development, a self-directed learner, and most importantly, I'm always striving to improve my IT knowledge and keep myself up to date. I've had the chance to work with numerous teams on a variety of projects during my career, including those in banking, social media, monitoring, and trading. I always made sure to use the proper work practices and methods and to ensure that the code was clear and structured. Backend: - NestJs - ExpressJs - Strapi Frontend: - Angular - React DevOps - Docker -...

Vladyslav P.
$20/hr
  • Trophy Icon NoSQL
  • JavaScript
  • Vue.js
  • Node.js
  • Serverless Computing
  • AWS Amplify
  • AWS Lambda
  • Amazon DynamoDB
  • Visualization
  • D3.js
  • Plotly

@ Front-end + Typescript + Vue + D3.js, Plotly + Tailwind, Bootstrap + CSS (SASS) @ Back-end + Node.js, Express.js + AWS (Amplify, Lambda, Step functions, DynamoDB, Cognito)

Nirav S.
$35/hr
  • Trophy Icon NoSQL
  • Serverless Computing
  • Amazon Cognito
  • AWS Lambda
  • AWS CloudFront
  • AWS CodeDeploy
  • AWS Server Migration
  • AWS AppSync
  • AWS Amplify
  • AWS Application
  • Implementation
  • AWS CloudFormation
  • AWS Systems Manager
  • Cloud Computing
  • Amazon Web Services
  • Software Development

♛ AWS Certified Cloud practitioner help you to investigate and set up​ your AWS infrastructure as well as experts in AWS Lambda development, AWS API Development, AWS Serverless, AWS AppSync, AWS Amplify and other AWS services. Very comfortable to work with AWS Lambda, AWS DynamoDB, Cognito, EC2, S3, Could-front, RDS, Elastic Search, DevOps, React.js, Angular, Node JS, Python ♛ Assure you for 100% Job satisfaction guarantee. I am glad to inform that I have achieved 99% Client satisfaction ratio to​ date on various platforms. Part of AWS Consulting Partner​ company. Top performer at people per hour portal. Visit : pph.me/eternalsoft As a...

Vaibhav G.
$10/hr
  • Trophy Icon NoSQL
  • API Development
  • HTML5
  • Divi
  • PHP
  • PSD to WordPress
  • WooCommerce
  • Custom Content Management System
  • WordPress e-Commerce
  • CSS 3

I am an experience web developer specialising in high quality web development for many CMS like WordPress, Drupal, Magento etc. From custom theme designs to E-Commerce, Custom PHP and WP custom plugin development, I will transform your personal or business concept into a successful website. My key skills are: - WordPress Theme Creation from PSD - Wordpress Theme Creation from HTML/CSS - WordPress Pre-Made/Premium Plugins/Theme Customisation - Wordpress Custom Plugins Development from scratch - Wordpress Woo commerce Customisation/development - Wordpress Website Speedup - PHP Custom website creation - WooCommerce custom plugin creation -...

Muhammad Adil R.
$30/hr
  • Trophy Icon NoSQL
  • Game Consultation
  • Blockchain Architecture
  • Node.js
  • Initial Coin Offering
  • JavaScript
  • Blockchain Development
  • NoSQL Database
  • Ethereum
  • Java
  • Smart Contract
  • API
  • Business Strategy
  • React
  • Consultant

I am experienced in leveraging agile frameworks to provide a robust synopsis for high level overviews. I and A creative web developer and designer that works with great joy . i will design develop and fix your website for your events include designing user interactions on websites, developing servers and databases for website functionality and coding for mobile platforms . i am also a good designer and creative writer

Asim Z.
$30/hr
  • Trophy Icon NoSQL
  • Python
  • React
  • JavaScript
  • Docker
  • Flask
  • RESTful Architecture
  • Django
  • API Integration
  • Elasticsearch
  • Next.js
  • Node.js
  • Kubernetes
  • PostgreSQL

I have good base of programming. Not dependent on any language and keen to work on new technologies. Give hundred percent to achieve desire goals.I can work in both environments Linux and Windows. Technical Skills ● Programming Languages Python, PHP, JavaScript/React.js, HTML5. ● Frameworks Django, Flask, Osclass, Laravel, Rocketsled ● Databases MySQL, PostgreSQL ● Devops AWS, GCP, docker, kubernetes, jenkins, pipelines ● Design Methodologies...

Amit A.
$15/hr
  • Trophy Icon NoSQL
  • Java
  • Java EE
  • Spring Framework
  • Hibernate
  • Selenium WebDriver
  • JavaFX
  • REST
  • API Development
  • AngularJS
  • Apache Struts

Over 6 years of professional experience in software development. I have extensive experience with Java, Spring, Spring WebFlow, Struts, SOAP, REST, JDBI, Hibernate, J2EE, JSP, JSF, Eclipse RCP/Plugin development, SWT/JFace, CSS/XHTML/HTML5/Javascript/AnuglarJS/JQuery. Expert in developing software for Web as well as desktop Application. I have fluency in English and have excellent written and spoken communication skills. I am a hard worker and highly proactive to deliver quality assured services along with constructive suggestion wherever required for driving the project to success.

Kashif T.
$75/hr
  • Trophy Icon NoSQL
  • Zoho Creator
  • Zoho CRM
  • WordPress
  • HTML
  • CRM Software
  • Automated Workflow
  • Google APIs
  • API Integration
  • Zoho Platform
  • Automation
  • Zoho Books
  • CSS

Seasoned Zoho Creator & CRM Developer offering the following services: 1) Zoho Creator Application Development. 2) Zoho CRM Setup & Customisation (Custom Buttons, Custom functions, API Integration). 3) Zoho CRM integration with other Zoho products. 4) Zoho CRM integration with Third Party services through API's (3dcart, shopify etc). 5) Zoho CRM API v1 to v2 migration. 5) Zoho Creator API v1 to v2 migration. Experience: ========= More than 12 years of industry experience as an executive with a focus on business process development, implementation and management. Throughout my carrier, I have been using and developing in Zoho Platform...

Alejandro V.
$12/hr
  • Trophy Icon NoSQL
  • JavaScript
  • React
  • Vue.js
  • Angular
  • Python
  • Node.js
  • MongoDB
  • SQL
  • Firebase
  • Django

Specialized in web, mobile and desktop software development with Javascript, Typecript, Angular, Vue, React.js, Next.js, Gatsby.js, Nuxt js, GraphQL, RestFull, MongoDB, Firebase, MySQL, PosgrSQL, Python, Django , Flask, Bootstrap, Material Design, React Native, Ruby on Rails, Java. I have experience creating responsive web pages, PWA's, covering both backend and frontend development. My main strengths are javascript / typecript, Python, Django, Flask, NodeJs, React, Vue, Node.js, GraphQL and MongoDB. I am interested in better my skills with python for backend development and machine learning.

Mohamad B.
$12/hr
  • Trophy Icon NoSQL
  • MySQL
  • Python
  • PHP
  • Laravel
  • Ionic Framework
  • JavaScript
  • Angular
  • AngularJS
  • HTML
  • Electron
  • Node.js
  • CSS
  • HTML5
  • Progressive Web App
  • React Native

I am a custom web and app developer, I have created several apps in web or hybrid technology, such as POS for cafe, Service booking for Technician, Lyrics app for kids song, Lesson slide player for music education, Fundrising website, Event ticketing portal, Web Scraper, etc. These are the technology I am using : Basic HTML, CSS, Javascript, PHP, Python, C# Frontend Angular, Svelte, Alpinejs, Vite, WindiCSS, TailwindCSS, Bootstrap Hybrid Ionic, ElectronJs, CapacitorJS, Cordova, XCode, React Native (Expo) Backend Laravel, Codeigniter, Expressjs, Firebase, Appwrite, .NET, Socket.io Server AWS, Docker, Apache, Nginx, Linux Design Figma,...

Donald A.
$50/hr
  • Trophy Icon NoSQL
  • MySQL
  • API
  • Python
  • PHP
  • Laravel
  • WordPress
  • JavaScript
  • Swift
  • WordPress Plugin
  • Plugin Development
  • Vue.js
  • Linux
  • Golang
  • DevOps
  • Video Editing

Hi! I am Donald, a software developer, tech consultant, and entrepreneur with over 15 years of experience building solutions across various platforms. I am a proponent of paying attention to details, strategy, creativity, simplicity, thinking outside the box, automation, and efficiency. I started my career in 3D Animation, Video Editing, and Graphics Design, but my curiosity led me deeper to the core of technology and how the software tools I used work, so I became a software developer. Over the years I have built software for desktop, mobile, and the web. I have also been actively involved in all stages of SDLC(Software Development Life...

Muhammad F.
$15/hr
  • Trophy Icon NoSQL
  • PSD to HTML
  • HTML
  • PHP
  • CodeIgniter
  • WordPress
  • CSS 3
  • Bootstrap
  • Web Design
  • Graphic Design
  • Plugins for Wordpress

I am a web developer and have been doing web development for over 10 years. And I have full knowledge of wordpress. I have built many websites and online shops in WordPress. Theme Customization & Designing, Plugin Installation & Customization, Payment Gateway Integration, WooCommerce, SEO Plugin, WP Bakery Page Builder, Devi Theme, Elementor Theme, Contact Form 7, WP Form, Google Business Account, Google Webmaster Account, Google Analytics and more. Requirements for any website I am familiar with. I have been doing this for many years and now I have no problem doing it. I try to take and do less and better work to the best of my...

Ritik K.
$14/hr
  • Trophy Icon NoSQL
  • AMP Web Development
  • Node.js
  • React
  • Angular
  • HTML
  • JavaScript
  • MongoDB
  • Android App Development
  • Flutter
  • Bootstrap
  • CSS 3
  • Firebase
  • Next.js

Hi, my name is Ritik from India, and I have been into web development for over 3 years and have worked with multiple frontend and backend technologies. I am still at University but don't turn away yet before looking at my skills and the kind of work I can do for you. I have worked as an intern at Gravitas AI and soon going to be working at Microsoft India as a Software Engineer. I can create scalable business solutions and interactive and responsive frontend layouts. Skilled in - HTML, CSS and JavaScript (also TypeScript) - Node.js - React and Next.js - Angular - MongoDB - MySQL - GraphQL - AWS - Firebase I can help on a bunch of...

Ajay K.
$20/hr
  • Trophy Icon NoSQL
  • CodeIgniter
  • CSS
  • JavaScript
  • AJAX
  • CakePHP
  • WordPress
  • MySQL
  • PHP
  • Angular
  • Firebase Cloud Firestore
  • Node.js
  • Database Development
  • TypeScript
  • Git
  • PostgreSQL

I have 10 years of experience in software, of which more than 6 years in website development and deployment using MVC, PHP, MySQL server, SQL Server, HTML, CSS, JavaScript, jQuery, AngularJS and KnockoutJS, NodeJs. I have implemented Hybrid mobile applications using Cordova, Phonegap, Ionic and Xamarin. I have done a lot of scraping, scraping the data both from structured and unstructured sources. My unique ability comes in understanding what the client's bigger goal is and helping him achieve that goal by providing him technology suggestions and also implement those suggestions to his satisfaction.

Kishan M.
$15/hr
  • Trophy Icon NoSQL
  • Web Scraper
  • API
  • Python
  • Django
  • Data Scraping
  • Scripting
  • Scrapy
  • Software Architecture & Design
  • Linux
  • Amazon Web Services
  • Relational Database
  • Flask

Hello 👋, If you are looking for an experienced software developer with a fast response time and good commitment habits please consider me. Since 2013, I have been working with Python and its various frameworks like Django, Flask, DRF, Scrapy, etc. I specialize in web development using Django, Rest API development, and Deployment. I have worked for a number of Indian startups as an API developer in past. My recent project involves working with the Scrapy framework and ReactJS frontend. I am hopeful I can help you so let's connect. :) Thanks, Kishan 🇮🇳

Mohamed A.
$75/hr
  • Trophy Icon NoSQL
  • Unix System Administration
  • Linux System Administration
  • WordPress
  • Android
  • React Native
  • WebRTC
  • React Native
  • Mobile App Development
  • Web Apps
  • Docker
  • Terraform
  • Electron
  • JavaScript
  • PHP

Full-stack Developer, specialize in end-to-end development of websites and applications from concept to delivery. With more than 12 years of hands on experience focusing in the below : Development : - ExpressJS / AngularJS / React.js / Node.js - Laravel / PHP - Electron JS - CODEIGNITER - ReactNative - ReactJS - JQUERY - SHOPIFY - CAKE-PHP - OPENCART - WORDPRESS - API - Ajax - GitHub ,Bit Bucket, GitLab and SVN. - JavaScript. - Python. - Shell Script. WebRTC : - Kurento. - Jitsi. - Licode. - Janus. - ANT media - MediaSoup - Big Blue Button. - Turn and Stun - Live...

Dmitry D.
$35/hr
  • Trophy Icon NoSQL
  • PHP
  • MySQL Programming
  • Amazon Web Services
  • Symfony
  • WordPress
  • Magento
  • Joomla
  • Drupal
  • JavaScript
  • jQuery

Programming languages: PHP, JavaScript, SQL, Typescript Main backend frameworks: Symfony (all versions: 1.*, 2, 3, 4) Libraries PHP: PEAR, Smarty, tidy, domxml, SPL, TCPDF\fPDF, PHPExcel, php-amqplib Other frameworks: PHP: Laravel, Zend; NodeJS: Express, Adonis.js Main frontend frameworks and libraries: React.js (+ Redux), Angular, Vue.js; jQuery, Fabric.js, Three.js, Leaflet Other frontend frameworks and libraries: Backbone.js, Ember.js CMSs: Wordpress, Drupal 8 eCommerce: Magento, Sylius UI frameworks: Bootstrap, Semantic UI, Material UI Mobile cross-platform development: Cordova, Ionic, React Native Third-party services: PayPal,...

Abdessalem K.
$50/hr
  • Trophy Icon NoSQL
  • Front-End Development
  • Angular
  • TypeScript
  • RxJS
  • HTML
  • Git
  • Node.js
  • Web Application
  • Firebase Cloud Firestore
  • Stripe
  • Firebase
  • React
  • JavaScript
  • Storybook
  • CI/CD

💎 Hello, my name is Selem, and I'm a JavaScript software engineer with 7 years of experience, 100% job success rate and Top Rated Plus status on Upwork (Top 3%). As a web development enthusiast, my primary goal with each project is to deliver high-performing, secure, and reliable apps that make you happy. ---------------------------- WEB DEVELOPMENT ---------------------------- — Listed below are my experiences and skills: ✅ HTML. ✅ CSS/SASS/Tailwind CSS. ✅ JavaScript/TypeScript. ✅ Angular (2+). ✅ React. ✅ Ionic (4+). ✅ Storybook. ✅ RxJS. ✅ REST API. ✅ Firebase. ✅ NodeJS. ✅ Stripe. ✅ OpenAI. ✅ CI/CD. ✅ Cypress, Jest. ✅ Git....

Denis A.
$70/hr
  • Trophy Icon NoSQL
  • Java
  • Ad Server
  • Amazon Web Services
  • DevOps
  • Real-Time Bidding
  • Docker
  • Apache Kafka
  • Elasticsearch
  • ClickHouse
  • ETL Pipeline
  • API Development
  • Aerospike
  • Core Java
  • Microservice
  • Spring Framework

A Senior Java Developer and Architect with 15+ years of experience in Java developoment and DevOps. I have been a Team lead in the development of several market-leading platofrms. I specialize in the development of high-performance Java web applications which process millions of requests per second. Also, I have broad experience in applying Ad Tech standards (OpenRTB, VAST, MRAID, etc.) and implementing integrations with various Ad Servers. My team has developed enterprise-level solutions in: ✓ AdTech (Ad Server, Ad Exchange, Advertising Platform, SSP, DSP) ✓ Data Engineering; ✓ DevOps; ✓ Big Data; Whether you have very detailed...

Sumit V.
$40/hr
  • Trophy Icon NoSQL
  • Angular
  • Flutter
  • Node.js
  • GraphQL
  • NestJS
  • RxJS
  • WebRTC
  • MongoDB
  • Dart
  • Mobile App Development
  • TypeScript
  • Solidity
  • Blockchain
  • Blockchain Development
  • React

🥇 5+ Years as a Full-stack developer 🥇 3+ Years as a Cross Platform Mobile Application Developer 🥇 1+ Years as a Blockchain(Web3) Developer 📌 Frameworks: ➳ Programming: Javascript, Typescript, Dart ➳ Frontend: Angular, React, Flutter, Svelte ➳ Backend: Node.js, NestJS ➳ Blockchain: Solidity ➳ Database: MongoDB, Postgres, SQL, SQLite ➳ API Utilities: Firebase, GraphQL, Websockets, JWT, Passport.js, Lambda, Serverless ➳ Devops: Docker, Docker Compose, AWS, Google Cloud ➳ Version Control: Gitlhub, Gitlab, Bitbucket 📌 Can help you with: ➳ Developing an End to End Web & Mobile & Blockchain Application with Best Practises ➳ Version...

abhinand v.
$17/hr
  • Trophy Icon NoSQL
  • PHP
  • WordPress
  • CodeIgniter
  • Laravel
  • AngularJS
  • Node.js
  • Vue.js
  • AWS Lambda
  • eCommerce
  • API Development
  • BootstrapVue
  • Next.js
  • Nuxt.js
  • React
  • Flutter

We are an exclusive team of the top 3% of software developers, designers, product managers, and project managers in Asia/India. Top companies from the UK and the USA hire our developers for their most important projects. We are an Upwork Spotlighted Agency since 2013 with 100% job completion rating and $2mil+ in total project value: Many companies, both large and small — face challenges with finding top talent, from candidate qualifications, to team dynamics, to economics that fit their financial scale. Our unique solution for hiring elite software developers addresses all of these concerns. QUALIFICATIONS OF OUR TALENT...

Rezaur Rahman C.
$30/hr
  • Trophy Icon NoSQL
  • PHP
  • Symfony
  • Laravel
  • AJAX
  • WordPress
  • Magento
  • CSS
  • MySQL
  • JavaScript
  • HTML
  • RESTful Architecture
  • REST
  • WooCommerce
  • API

Senior PHP developer with 7 years of commercial experience. Looking to work on exciting projects with exciting clients. Full of experience, hard work and enthusiasm. **Things I can do for You:** -- Full Stack development -- PHP Framework Projects (Laravel, Symfony, Zend and more) -- CMS (WordPress, Drupal, Prestashop, Magento and more ) -- MySql -- WebServer Build and Maintain(from scratch, Google Cloud Compute, Amazon Web Services) -- Front End development (HTML5, CSS, SCSS, Bootstrap and other commonly used language, tools) -- JavaScript (raw js, Angular, JQuery, JData and more) Please check work history below for related Work...

Amritpal S.
$25/hr
  • Trophy Icon NoSQL
  • PHP
  • Laminas
  • CodeIgniter
  • AngularJS
  • CSS 3
  • HTML5
  • WordPress
  • Laravel
  • Node.js
  • Symfony
  • WordPress
  • Hybrid App Development
  • Vue.js

🥇Top 1% Upwork Talent - I am an Up-work Pro developer, which according to Upwork, makes me one of the top 1% developers in the entire community of developers with a 100% job success rate. I am a full stack developer working from the last 11 years with experience in popular and known PHP, JS, and CSS frameworks, Nodejs, MongoDB. I consider myself a good team player, hard worker, quality-oriented, have high analytical skills, fast learner, and enthusiastic to new technologies. PHP: Cakephp, Zend, Symfony, Codeigniter, Laravel, WordPress JS: jQuery, Angularjs, Nodejs, Reactjs, Backbone, Kendo CSS: Bootstrap, Less, Sass I have years of...

Jan Earvin G.
$25/hr
  • Trophy Icon NoSQL
  • JavaScript
  • CSS
  • Django
  • HTML
  • Python
  • NGINX
  • Ubuntu
  • AngularJS
  • REST
  • Responsive Web Design

I am working as a programmer, my skills includes developing Web applications using Python language and Django Web Framework. Comfortable in Agile development (Scrum). I am easy to work with, open minded and is very flexible with any timezone. I am currently available to work on cool projects right now :)

$NaN/hr

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SQL vs. NoSQL Databases: What is the Difference?

In the world of database technology, there are two main types of databases: SQL and NoSQL—or, relational databases and non-relational databases. The difference speaks to how they’re built, the type of information they store, and how they store it. Relational databases are structured, like phone books that store phone numbers and addresses. Non-relational databases are document-oriented and distributed, like file folders that hold everything from a person’s address and phone number to their Facebook likes and online shopping preferences.

We call them SQL and NoSQL, referring to whether or not they’re written solely in structured query language (SQL). In this article, we’ll explore what SQL is, how it makes these databases different, and how each type structures the data it holds so you can easily determine which type is right for you.

SQL: Relational databases

First, let’s take a look at one of the main features that separates these two systems: the way they structure data. A relational database—or, an SQL database, named for the language it’s written in, Structured Query Language (SQL)—is the more rigid, structured way of storing data, like a phone book. Developed by IBM in the 1970s, a relational database consists of two or more tables with columns and rows. Each row represents an entry, and each column sorts a very specific type of information, like a name, address, and phone number. The relationship between tables and field types is called a schema. In a relational database, the schema must be clearly defined before any information can be added.

For a relational database to be effective, the data you’re storing in it has to be structured in a very organized way. A well-designed schema minimizes data redundancy and prevents tables from becoming out-of-sync, a critical feature for many businesses, especially those that record financial transactions. A poorly designed schema can result in organizational headaches due to its rigidity. For example, a column designed to store U.S. phone numbers might require 10 digits because that’s the standard for phone numbers in the U.S. This has the advantage of rejecting any invalid values (for example, if a number is missing an area code). However, if you need to change the schema (for instance, if you need to include an international phone number entry with more than 10 digits), then the entire database needs to be edited. Key takeaway: excellent organization results in a compromise in flexibility with a relational database.

Structured Query Language (SQL) is a programming language used by database architects to design relational databases. In an SQL database like MySQL, Sybase, Oracle, or IBM DM2, SQL executes queries, retrieves data, and edits data by updating, deleting, or creating new records. SQL is a lightweight, declarative language that does a lot of heavy lifting for the relational database, acting like a database’s version of a server-side script. One particular advantage of SQL is its simple-yet-powerful JOIN clause, which allows developers to retrieve related data stored across multiple tables with a single command.

Another reason SQL databases remain popular is that they fit naturally into many venerable software stacks, including LAMP and Ruby-based stacks. These databases are well understood and widely supported, which can be a major advantage if you run into problems.

Popular SQL databases and RDBMS’s

  • MySQL—the most popular open-source database, excellent for CMS sites and blogs.
  • Oracle—an object-relational DBMS written in the C++ language. If you have the budget, this is a full-service option with great customer service and reliability. Oracle has also released an Oracle NoSQL database.
  • IMB DB2—a family of database server products from IBM that are built to handle advanced “big data” analytics.
  • Sybase—a relational model database server product for businesses primarily used on the Unix OS, which was the first enterprise-level DBMS for Linux.
  • MS SQL Server—a Microsoft-developed RDBMS for enterprise-level databases that supports both SQL and NoSQL architectures.
  • Microsoft Azure—a cloud computing platform that supports any operating system, and lets you store, compute, and scale data in one place. A recent survey even put it ahead of Amazon Web Services and Google Cloud Storage for corporate data storage.
  • MariaDB—an enhanced, drop-in version of MySQL.
  • PostgreSQL—an enterprise-level, object-relational DBMS that uses procedural languages like Perl and Python, in addition to SQL-level code.

NoSQL databases: Non-relational & distributed data

If your data requirements aren’t clear at the outset or if you’re dealing with massive amounts of unstructured data, you may not have the luxury of developing a relational database with clearly defined schema. Enter non-relational databases, which offer much greater flexibility than their traditional counterparts. Think of non-relational databases more like file folders, assembling related information of all types. If a WordPress blog used a NoSQL database, each file could store data for a blog post: social likes, photos, text, metrics, links, and more.

Unstructured data from the web can include sensor data, social sharing, personal settings, photos, location-based information, online activity, usage metrics, and more. Trying to store, process, and analyze all of this unstructured data led to the development of schema-less alternatives to SQL. Taken together, these alternatives are referred to as NoSQL, meaning “Not only SQL.” While the term NoSQL encompasses a broad range of alternatives to relational databases, what they have in common is that they allow you to treat data more flexibly.

How do NoSQL databases work? Instead of tables, NoSQL databases are document-oriented. This way, non-structured data (such as articles, photos, social media data, videos, or content within a blog post) can be stored in a single document that can be easily found but isn’t necessarily categorized into fields like a relational database does. It’s more intuitive, but note that storing data in bulk like this requires extra processing effort and more storage than highly organized SQL data. That’s why Hadoop, an open-source computing and data analysis platform capable of processing huge amounts of data in the cloud, is so popular in conjunction with NoSQL database stacks.

NoSQL databases offer another major advantage, particularly to app developers: ease of access. Relational databases have a fraught relationship with applications written in object-oriented programming languages like Java, PHP, and Python. NoSQL databases are often able to sidestep this problem through APIs, which allow developers to execute queries without having to learn SQL or understand the underlying architecture of their database system.

Common types of NoSQL databases

  1. Key-value model—the least complex NoSQL option, which stores data in a schema-less way that consists of indexed keys and values. Examples: Cassandra, Azure, LevelDB, and Riak.
  2. Column store—or, wide-column store, which stores data tables as columns rather than rows. It’s more than just an inverted table—sectioning out columns allows for excellent scalability and high performance. Examples: HBase, BigTable, HyperTable.
  3. Document database—taking the key-value concept and adding more complexity, each document in this type of database has its own data, and its own unique key, which is used to retrieve it. It’s a great option for storing, retrieving and managing data that’s document-oriented but still somewhat structured. Examples: MongoDB, CouchDB.
  4. Graph database—have data that’s interconnected and best represented as a graph? This method is capable of lots of complexity. Examples: Polyglot, Neo4J.

Popular NoSQL databases

  • MongoDB—the most popular NoSQL system, especially among startups. A document-oriented database with JSON-like documents in dynamic schemas instead of relational tables that’s used on the back end of sites like Craigslist, eBay, Foursquare. It’s open-source, so it’s free, with good customer service. Read more in Should You Use MongoDB? A Look at the Leading NoSQL Database.
  • Apache’s CouchDB—a true DB for the web, it uses the JSON data exchange format to store its documents; JavaScript for indexing, combining and transforming documents; and, HTTP for its API.
  • HBase—another Apache project, developed as a part of Hadoop, this open-source, non-relational “column store” NoSQL DB is written in Java, and provides BigTable-like capabilities.
  • Oracle NoSQL—Oracle’s entry into the NoSQL category.
  • Apache’s Cassandra DB—born at Facebook, Cassandra is a distributed database that’s great at handling massive amounts of structured data. Anticipate a growing application? Cassandra is excellent at scaling up. Examples: Instagram, Comcast, Apple, and Spotify.
  • Riak—an open-source key-value store database written in Erlang. It has fault-tolerance replication and automatic data distribution built in for excellent performance.

Reasons to use a SQL database

When it comes to database technology, there’s no one-size-fits-all solution. That’s why many businesses rely on both relational and nonrelational databases for different tasks. Even as NoSQL databases gain popularity for their speed and scalability, there are still situations where a highly structured SQL database may be preferable. Here are a few reasons you might choose an SQL database:

  1. You need to ensure ACID compliancy (Atomicity, Consistency, Isolation, Durability). ACID compliancy reduces anomalies and protects the integrity of your database by prescribing exactly how transactions interact with the database. Generally, NoSQL databases sacrifice ACID compliancy for flexibility and processing speed, but for many e-commerce and financial applications, an ACID-compliant database remains the preferred option.
  2. Your data is structured and unchanging. If your business is not experiencing massive growth that would require more servers and you’re only working with data that’s consistent, then there may be no reason to use a system designed to support a variety of data types and high traffic volume.

Reasons to use a NoSQL database

When all of the other components of your server-side application are designed to be fast and seamless, NoSQL databases prevent data from being the bottleneck. Big data is the real NoSQL motivator here, doing things that traditional relational databases cannot. It’s driving the popularity of NoSQL databases like MongoDB, CouchDB, Cassandra, and HBase.

  1. Storing large volumes of data that often have little to no structure. A NoSQL database sets no limits on the types of data you can store together, and allows you to add different new types as your needs change. With document-based databases, you can store data in one place without having to define what “types” of data those are in advance.
  2. Making the most of cloud computing and storage. Cloud-based storage is an excellent cost-saving solution, but requires data to be easily spread across multiple servers to scale up. Using commodity (affordable, smaller) hardware on-site or in the cloud saves you the hassle of additional software, and NoSQL databases like Cassandra are designed to be scaled across multiple data centers out of the box without a lot of headaches.
  3. Rapid development. If you’re developing within two-week Agile sprints, cranking out quick iterations, or needing to make frequent updates to the data structure without a lot of downtime between versions, a relational database will slow you down. NoSQL data doesn’t need to be prepped ahead of time.

Now that you’ve got an overview of SQL vs. NoSQL, who do you need to help you build and maintain your database systems? Relational and non-relational database management systems can get extremely complicated, and definitely require upkeep—especially when you factor in moving to the cloud. While it’s easy to manage a basic single-file database in a program like Microsoft Access, you’ll want to hire a capable database architect to handle your relational database management system (RDBMS) or NoSQL database management.

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