Key Differences Between MySQL 7 and 0

Compatibility and Upgrade Considerations

Upgrade Process

Let’s explore some key differences and new features introduced in MySQL 8.0 compared to MySQL 5.7:

Data Dictionary

MySQL 8.0 uses a new data dictionary implemented as InnoDB tables, replacing the traditional MyISAM-based system tables used in MySQL 5.7.Z”.
This change improves performance and reliability of data dictionary operations.

JSON Enhancements

MySQL 8.0 introduces new JSON functions and operators, making it easier to work with JSON data.
New functions include JSON_TABLE, JSON_OVERLAPS, and more.

Window Functions

MySQL 8.0 supports window functions (e.g., ROW_NUMBER(), RANK(), LEAD(), LAG()), enabling advanced analytical queries.

Common Table Expressions (CTEs)

MySQL 8.0 introduces support for CTEs, making complex queries more readable and maintainable.

Roles

MySQL 8.0 introduces roles, allowing users to group privileges and simplify user management.

Improved Security

MySQL 8.0 improves security with default password policies, stronger encryption, and enhanced authentication plugins.

Moving from MySQL 5.7 to 8.0 What You Should Know

MySQL 8.0 introduced significant improvements and new features compared to its predecessor, MySQL 5.7. If you’re planning to upgrade from MySQL 5.7 to MySQL 8.0, there are several important considerations and changes to be aware of.

In this article, we’ll explore key differences between MySQL 5.7 and 8.0, along with essential steps and concepts to facilitate a smooth transition.