List of Popular Web App Databases

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Many different types of databases exist, with different features and capabilities. Some databases are relational (or SQL-based), while others are non-relational (NoSQL). These are the best databases for web applications. Depending upon your needs choose a right database to build your software applications.?

?1.MySQL (Relational)?

?MySQL is a relational database management system (RDBMS) based on SQL. It is a popular database server, and a multi-user, multi-threaded SQL database. MySQL is developed by Oracle Corporation. The name "MySQL" is a play on the name of co-founder Michael Widenius's earlier project, Monty Python's Flying Circus. It is written in C and C++ programming languages, with some elements written in Java. It has been licensed under GPLv2 since 2004, but it can be used under the terms of the GNU Affero General Public License.?

?MySQL database is often used for data storage, especially in web applications, and it is also widely used for creating and maintaining relational database tables. MySQL is owned by Oracle Corporation and was developed by a Swedish company called MySQL AB, which was bought by Sun Microsystems in 2008. As of 2009, the project is managed by Oracle Corporation.?

?It has become the most popular open source and best database software in the world, used on the web and mobile applications, by corporations large and small and across all industries.?

?2.PostgreSQL (Relational)?

?An object-relational database management system that supports SQL-based queries, similar to those used by other RDBMS systems such as MySQL or Oracle Database. PostgreSQL is developed and maintained by PostgreSQL Global Development Group, which is made up of several companies and individuals who have contributed code to the project over time.?

PostgreSQL's developers do not require contributors to sign a Contributor License Agreement (CLA). The PostgreSQL license includes a clause requiring attribution of original authorship if it's not done automatically by the contributor's revision control system.?

The software is distributed under an ISC license, which allows anyone to use it for any purpose without paying royalties or fees.?

?3.MongoDB (Non-Relational)?

?MongoDB is an open-source document-oriented database developed by MongoDB Inc. (formerly 10gen). The first version was released in 2009. It is written in C++ and provides a document-oriented data model that can be queried using a JSON-like query language.?

A document can be thought of as a virtual "sheet" or "document" in a spreadsheet application such as Microsoft Excel or Google Sheets. A document contains multiple fields that may be similar to cells in an Excel spreadsheet or cells in an Access database table. These fields can have different types: text, numbers, dates, and so on.?

MongoDB's development began in 2007 when its creators were working on software for the social media website Facebook.com. They attempted to create a new kind of database that would be better suited to the needs of web applications than traditional relational databases, but they found that commercial offerings did not meet their requirements. As a result, they developed a prototype called GridFS before founding 10gen to continue work on it as a product named MongoDB. In 2009, the company changed its name to MongoDB Inc., and in February 2010 it released the first production version of MongoDB.?

4.?Cassandra (Non-Relational)?

Cassandra is an open-source database management system that runs on many servers, making it well-suited for handling large amounts of data. It offers fast performance and can scale up to a petabyte of data across multiple servers, making it useful for applications with high write-throughput requirements.?

Cassandra is built on the principles of Dynamo with the goal of addressing some of its problems. The technology was developed at Facebook and released as an Apache Incubator project in 2009. It graduated from incubation in June 2010 and became an Apache Top-level Project (TLP) in January 2012.?

?Cassandra's architecture is based on Dynamo, but differs from it significantly in its design details, especially regarding consistency guarantees and failure detection mechanisms. In particular, Cassandra does not provide strong consistency; instead, it aims to provide high availability by making it easy to deploy multiple copies of the data across many hosts while tolerating failures at any one host. This makes Cassandra a popular choice for internet startups that must scale quickly and cheaply.?

?Cassandra is a key-value store, but it has flexible data models, so you can use it to store virtually any kind of data. You can also use Cassandra for full-text search, or even for storing graph data (although there are better options for graph storage than Cassandra).?

?5.Neo4j (Graph database)?

?Neo4j is an open-source graph database management system that stores data in a native graph database format. It's designed to store data and query it very quickly, making it ideal for applications that involve complex relationships between entities. It uses the native graph data model to provide ACID transactions, high availability, and indexing. It's used by many companies to power their critical applications, including eBay and Walmart.?

?Unlike relational databases, Neo4j doesn't enforce a schema on your data. This makes it easier to build applications that model real-world problems such as social networks or product recommendations. You can create multiple nodes for the same entity without duplicating data or having to use foreign keys. In addition, Neo4j allows you to add properties to existing nodes without having to create a new table first. These features make Neo4j much more agile than traditional relational databases when modelling complex relationships between entities with many attributes and relationships between them.?

6.MariaDB (Relational)?

?MariaDB is a fork of the MySQL relational database management system intended to remain free under the GNU GPL. MariaDB was formed in 2009 by some of the original developers of MySQL when Oracle announced that it would no longer fully support the community-developed version of MySQL in Favor of a paid enterprise product.?

?The original developers of MySQL created MariaDB to provide a better development environment and more robust performance. MariaDB strives to be compatible with MySQL and includes most of its storage engines. However, not all features are supported in MariaDB Server so it is recommended that you check for compatibility before using any feature that may be affected by a bug or limitation in MariaDB Server.?

7.?MSSQL (Relational)?

?MSSQL databases are the core of Microsoft SQL Server. It is a relational database management system (RDBMS), a special type of database software that is used to create, store and manipulate data in an organized manner.?

?MSSQL can be used to build enterprise-level business solutions and applications. Regardless of the platform or device your users are using, you can use MSSQL to create a centralized data store with a single version of the truth. You can also use it to create a single source of truth for your data analytics and reporting technologies, such as Power BI and Tableau.?

?How to Connect Database to Web Application?

?Connecting a database to a web application is an important step in your development process. By connecting your database to your web application, you can easily add new data, modify existing data, delete data, and more.?

There are a few ways to do it. The simplest way is to use a direct query to get the value you need. This is not recommended because it will severely limit your flexibility and scalability.?

?Another approach is to use a stored procedure that returns the value. This can be done in SQL Server, MySQL server, or other RDBMSs. But what if your web application needs more than one value from the database? You would need to issue multiple queries or use another method.?

?The most common way to connect a database to an application is by using an Object Relational Mapper (ORM). This technology connects your program to the database and allows you to use it like a normal object. There are many different ORMs available today, but one of the most popular ones is called Active Record (AR). This library has been around for over 10 years now and has served as the foundation for many other ORMs such as Yii2 and Laravel.

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