MySQL

MySQL is the most popular and used open-source relational database management system. MySQL is an important part of LAMP (Linux, Apache, MySQL, PHP/Perl/Python), a widely used open source web application software package.

Advantages

• Open Source
• Cross-platform
• Very good performance
• Manages memory very well and ocupies low disk space
• Many tutorials on the internet
• Multiple GUI tools to choose from
• Can be installed from source code, allowing extra customization

Disadvantages

• MySQL doesn't provide good debugging tools
• Doesn't ship with a GUI tool

Features 

• Multilayered design with independent modules
• Fully multi-threaded using Kernel Threads
• Provides Transactional and Non-transactional storage engines

GUI Tools

• MySQL Workbench
• phpMyAdmin
• HeidiSQL
• Navicat

Versions

• MySQL 3.23
• MySQL 4.0
• MySQL 4.1
• MySQL 5.0
• MySQL 5.1
• MySQL 5.5
• MySQL 5.6
• MySQL 5.7