graphQL

SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. SQLite is the most used database engine in the world. SQLite is built into all mobile phones and most computers and comes bundled inside countless other applications that people use every day.

The SQLite file format is stable, cross-platform, and backwards compatible and the developers pledge to keep it that way through the year 2050. SQLite database files are commonly used as containers to transfer rich content between systems and as a long-term archival format for data. There are over 1 trillion (1e12) SQLite databases in active use.

SQLite source code is in the public-domain and is free to everyone to use for any purpose.

https://sqlite.org/index.html

Cassandra is a NoSQL distributed database. By design, NoSQL databases are lightweight, open-source, non-relational, and largely distributed. Counted among their strengths are horizontal scalability, distributed architectures, and a flexible approach to schema definition.

NoSQL databases enable rapid, ad-hoc organization and analysis of extremely high-volume, disparate data types. That’s become more important in recent years, with the advent of Big Data and the need to rapidly scale databases in the cloud. Cassandra is among the NoSQL databases that have addressed the constraints of previous data management technologies, such as SQL databases.

https://cassandra.apache.org/_/cassandra-basics.html

Couchbase is a distributed document database with a powerful search engine and in-built operational and analytical capabilities. It brings the power of NoSQL to the edge and provides fast, efficient bidirectional synchronization of data between the edge and the cloud.

https://www.couchbase.com/

IBM Db2 is a family of data management products, including the Db2 relational database. The products feature AI-powered capabilities to help you modernize the management of both structured and unstructured data across on-premises and multicloud environments. By helping to make your data simple and accessible, the Db2 family positions your business to pursue the value of AI.

Most of the Db2 family is available on the IBM Cloud Pak® for Data platform, either as an add-on or an included data source service, making virtually all of your data available across hybrid or multicloud environments to fuel your AI applications. Easily converge your transactional data stores and rapidly derive insights through universal, intelligent querying of data across disparate sources. Cut costs with the multimodel capability that eliminates the need for data replication and migration. Enhance agility by running Db2 on any cloud vendor.

https://www.ibm.com/analytics/db2

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. DynamoDB lets you offload the administrative burdens of operating and scaling a distributed database so that you don't have to worry about hardware provisioning, setup and configuration, replication, software patching, or cluster scaling. DynamoDB also offers encryption at rest, which eliminates the operational burden and complexity involved in protecting sensitive data.

With DynamoDB, you can create database tables that can store and retrieve any amount of data and serve any level of request traffic. You can scale up or scale down your tables' throughput capacity without downtime or performance degradation. You can use the AWS Management Console to monitor resource utilization and performance metrics.

DynamoDB provides on-demand backup capability. It allows you to create full backups of your tables for long-term retention and archival for regulatory compliance needs.

You can create on-demand backups and enable point-in-time recovery for your Amazon DynamoDB tables. Point-in-time recovery helps protect your tables from accidental write or delete operations. With point-in-time recovery, you can restore a table to any point in time during the last 35 days.

DynamoDB allows you to delete expired items from tables automatically to help you reduce storage usage and the cost of storing data that is no longer relevant.

https://aws.amazon.com/dynamodb/

MariaDB Server is one of the most popular database servers in the world. It’s made by the original developers of MySQL and guaranteed to stay open source. Notable users include Wikipedia, WordPress.com and Google.

MariaDB turns data into structured information in a wide array of applications, ranging from banking to websites. Originally designed as enhanced, drop-in replacement for MySQL, MariaDB is used because it is fast, scalable and robust, with a rich ecosystem of storage engines, plugins and many other tools make it very versatile for a wide variety of use cases.

MariaDB is developed as open source software and as a relational database it provides an SQL interface for accessing data. The latest versions of MariaDB also include GIS and JSON features.

https://mariadb.org/

MongoDB enables you to meet the demands of modern apps with an application data platform built on several core architectural foundations:

1. The document data model and an intuitive yet powerful query interface, giving developers the fastest way to innovate in building transactional, operational, and analytical applications.
2. A multi-cloud global database, giving developers the freedom to run their applications anywhere and the flexibility to move across private and public clouds as requirements evolve — without having to change a single line of application code.
3. A unified experience for modern applications that spans cloud to edge, in database, search, and the data lake, backed by comprehensive and integrated developer services.

https://www.mongodb.com/

MySQL is the world's most popular open source database. Whether you are a fast growing web property, technology ISV or large enterprise, MySQL can cost-effectively help you deliver high performance, scalable database applications.

https://dev.mysql.com/

Oracle Database - Oracle Database is the world's most popular database. Available on cloud and on-premise platforms, Oracle Database 19c is the most recent long term release, with an extended support window. Oracle Database 21c is the latest innovation release, initially available on Oracle cloud through Autonomous Database Free Tier and Database Cloud Service.

Oracle Database Cloud Services - Oracle Cloud provides several services to create and manage Oracle Database deployments quickly and easily.

https://www.oracle.com/index.html

PostgreSQL is a powerful, open source object-relational database system that uses and extends the SQL language combined with many features that safely store and scale the most complicated data workloads. The origins of PostgreSQL date back to 1986 as part of the POSTGRES project at the University of California at Berkeley and has more than 30 years of active development on the core platform.

PostgreSQL has earned a strong reputation for its proven architecture, reliability, data integrity, robust feature set, extensibility, and the dedication of the open source community behind the software to consistently deliver performant and innovative solutions. PostgreSQL runs on all major operating systems, has been ACID-compliant since 2001, and has powerful add-ons such as the popular PostGIS geospatial database extender. It is no surprise that PostgreSQL has become the open source relational database of choice for many people and organisations.

PostgreSQL comes with many features aimed to help developers build applications, administrators to protect data integrity and build fault-tolerant environments, and help you manage your data no matter how big or small the dataset. In addition to being free and open source, PostgreSQL is highly extensible. For example, you can define your own data types, build out custom functions, even write code from different programming languages without recompiling your database!

PostgreSQL tries to conform with the SQL standard where such conformance does not contradict traditional features or could lead to poor architectural decisions. Many of the features required by the SQL standard are supported, though sometimes with slightly differing syntax or function. Further moves towards conformance can be expected over time. As of the version 14 release in September 2021, PostgreSQL conforms to at least 170 of the 179 mandatory features for SQL:2016 Core conformance.

https://www.postgresql.org/

Redis is an open source (BSD licensed), in-memory data structure store used as a database, cache, message broker, and streaming engine. Redis provides data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes, and streams. Redis has built-in replication, Lua scripting, LRU eviction, transactions, and different levels of on-disk persistence, and provides high availability via Redis Sentinel and automatic partitioning with Redis Cluster.

You can run atomic operations on these types, like appending to a string; incrementing the value in a hash; pushing an element to a list; computing set intersection, union and difference; or getting the member with highest ranking in a sorted set.

To achieve top performance, Redis works with an in-memory dataset. Depending on your use case, Redis can persist your data either by periodically dumping the dataset to disk or by appending each command to a disk-based log. You can also disable persistence if you just need a feature-rich, networked, in-memory cache.

Redis supports asynchronous replication, with fast non-blocking synchronization and auto-reconnection with partial resynchronization on net split.

Redis also includes:

• Transactions
• Pub/Sub
• Lua scripting
• Keys with a limited time-to-live
• LRU eviction of keys
• Automatic failover

You can use Redis from most programming languages.

Redis is written in ANSI C and works on most POSIX systems like Linux, *BSD, and Mac OS X, without external dependencies. Linux and OS X are the two operating systems where Redis is developed and tested the most, and we recommend using Linux for deployment. Redis may work in Solaris-derived systems like SmartOS, but support is best effort. There is no official support for Windows builds.

https://redis.io/

Azure SQL is a family of fully managed, secure and intelligent SQL database services, built upon the same SQL Server engine. It offers a wide range of deployment options and control requirements application patterns to meet the most demanding migration and modernisation initiatives. With Azure SQL, you can rehost SQL workloads on SQL Server on Azure Virtual Machines, modernise existing applications with Azure SQL Managed Instance and support modern cloud applications with Azure SQL Database. You can manage your entire portfolio through a consistent and unified experience that provides scenario-based guidance for creating the right resources to meet your requirements.

SQL Server 2019 continues to push the boundaries of security, availability, and performance for all your data workloads, now with new compliance tools, higher performance on the latest hardware, and high availability on Windows, Linux and containers. Enhanced PolyBase enables you to query other databases like Oracle, Teradata, and Mongo DB directly from SQL Server without moving or copying the data.

Benefits

• Intelligence over all your data - SQL Server is a hub for data integration. Deliver transformational insights by querying across your entire data estate.
• Choice of language and platform - Build modern applications using any data, any language—on-premises and in the cloud, now on Windows, Linux, and Docker containers.
• Industry-leading performance - Take advantage of breakthrough scalability, performance, and availability for mission-critical, intelligent applications and data warehouses.
• Least vulnerable - Enhance security with encryption at rest and in motion. SQL Server is the least vulnerable database over the last 8 years in the NIST vulnerabilities database.
• Make faster, better decisions - Whether the robust enterprise reporting capabilities of SQL Server Reporting Services or the rich, interactive visuals from Power BI, SQL Server works with your favorite reporting tools.

https://www.microsoft.com/en-gb/sql-server/sql-server-downloads

Firebase is a mobile app platform developed by Google with integrated, unified client libraries in various mobile programming languages. Firebase's different backend-as-a-service (BaaS) features help you develop high-quality apps, grow your user base, and earn more money. Each feature works independently, and they work even better together.

https://firebase.google.com/

Azure Repos is a set of version control tools that you can use to manage your code. Whether your software project is large or small, using version control as soon as possible is a good idea.

Version control systems are software that help you track changes you make in your code over time. As you edit your code, you tell the version control system to take a snapshot of your files. The version control system saves that snapshot permanently so you can recall it later if you need it. Use version control to save your work and coordinate code changes across your team.

Even if you're just a single developer, version control helps you stay organized as you fix bugs and develop new features. Version control keeps a history of your development so that you can review and even roll back to any version of your code with ease.

Azure Repos provides two types of version control:

• Git: distributed version control
• Team Foundation Version Control (TFVC): centralized version control

https://azure.microsoft.com/en-us/services/devops/repos/

Bitbucket Cloud is a Git based code hosting and collaboration tool, built for teams. Bitbucket's best-in-class Jira and Trello integrations are designed to bring the entire software team together to execute on a project. Bitbucket provides one place for team to collaborate on code from concept to Cloud, build quality code through automated testing, and deploy code with confidence.

https://bitbucket.org/product/

Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.

https://git-scm.com/

GitHub is a code hosting platform for version control and collaboration. It lets you and others work together on projects from anywhere.

https://github.com/

GitLab is The DevOps platform that empowers organizations to maximize the overall return on software development by delivering software faster and efficiently, while strengthening security and compliance. With GitLab, every team can collaboratively plan, build, secure, and deploy software to drive business outcomes faster with complete transparency, consistency and traceability.

https://about.gitlab.com/