MySQL 8.0

How to Download MySQL 8.0 on Windows?

From the below link, you can easily download the MySQL version 8.

After downloading, unzip it and run the .exe file.

Then follow the steps:

• Choosing a setup type: Select the "Full" setup option. This installs every feature and product for MySQL. To proceed, use the "Next" button.
• Check Requirements: Your computer is tested to see if it meets the requirements. Click on each item to try to fix any failing prerequisites before clicking the Execute button, which will install them all automatically. "Next" should be clicked.
• Installation: The "Installation" tab lets you view the installed products. To download and set up the Products, click "Execute". Click "Next" once the installation is complete.
• Product Configuration: View the configured products. To configure the MySQL Server, select "MySQL Server 8.0.23". Select "Next" from the menu. Click the "Next" button after selecting "Standalone MySQL Server/Classic MySQL Replication". Set "Development Computer" as the configuration type, "Connectivity" as "TCP/IP," and "Port" as "3006" on the "Type and Networking" tab. "Next" should be clicked.
• Authentication Method: Select "Use Strong Password Encryption for Authentication". "Next" should be clicked.
• Accounts and Roles: Password-protect the root account. "Next" should be clicked.
• Windows Service: The "Windows Service" screen is where you set the Windows Service's server startup options. Click "Next" while keeping the default configuration.
• Apply Configuration: To apply the Server settings, click the "Execute" button. Click the "Finish" button when done.
• Product Configuration: Check that the "Product Configuration" page has been finished. Keep the default selection, then press the "Next" and "Finish" buttons to finish installing the MySQL package.
• You have the option to configure the router on the next screen. The "Next" button should be clicked after the "Finish" button.
• Connect to server: The root password (from Accounts and Roles) must be entered. To determine whether the connection was successful, click the "Check" button. Select "Next" by clicking.
• Apply Configuration: Press the "Execute" button after making your selections. Click the "Finish" button when done.
• Installation Complete: The installation is finished, as the "Installation Complete" screen indicates. Select "Finish" from the menu.

What is the main difference between other older versions of MySQL and MySQL 8.0?

Adding a new data dictionary and enhanced transaction management distinguish MySQL 8.0 from previous versions of MySQL, such as MySQL 5.7 and before. There were several notable improvements and upgrades brought about by this fundamental modification to MySQL's architecture:

• Data Dictionary: MySQL 8.0 introduced a modern data dictionary, replacing MyISAM-based system tables for metadata storage. Implemented using InnoDB storage engine tables, it improved the reliability, performance, and manageability of MySQL's internal data structures, making schema changes more atomic and transactional.
• Atomic Data Definition Language (DDL): MySQL 8.0 introduces atomic DDL statements, enabling DDL operations to be performed within transactions, simplifying schema changes, and ensuring consistency.

MySQL 8.0 introduced significant changes to its reliability, performance, and data management capabilities, laying the groundwork for other enhancements and features like transaction support, Common Table Expressions (CTEs), window functions, and JSON enhancements. These changes marked a significant database architecture and functionality advancement compared to older versions.

What are the features added in MySQL 8.0?

• Atomic DDL Statements: MySQL 8.0 introduced atomic Data Definition Language (DDL) statements, enabling transaction schema changes. This transactional nature simplifies schema modification management and ensures database consistency. DDL operations can fail or be rolled back seamlessly, ensuring seamless operation.
• Data Dictionary: MySQL 8.0 replaced MyISAM-based system tables with an InnoDB-based data dictionary, improving metadata storage and management. This upgrade enhances database reliability, performance, and scalability by optimizing storing and retrieving information about database objects like tables, indexes, and columns.
• Common Table Expressions (CTEs): MySQL 8.0 introduced Common Table Expressions (CTEs), simplifying complex SQL queries by defining temporary result sets within SELECT statements and enhancing query readability and maintainability by breaking down complex logic into manageable parts.
• Window Functions: MySQL 8.0 introduced window functions like ROW_NUMBER (), RANK (), and DENSE_RANK (), enabling advanced analytical queries over specific data partitions for more detailed data insights.
• JSON Enhancements: MySQL 8.0 has enhanced its JSON support, introducing JSON table functions for structured querying of JSON data and simplifying tasks like data extraction, transformation, and reporting.
• UTF8MB4 as Default Character Set: MySQL 8.0 defaulted to utf8mb4, ensuring full Unicode support, including emoji characters, without requiring additional configuration, accommodating the growing use of international characters and emojis in modern applications.
• Roles: Role-based access control was introduced in MySQL 8.0, enabling users to define roles with specific privileges. This simplifies user management and access control, allowing for more granular permissions management within the database.
• Performance Improvements: MySQL 8.0 enhances performance by optimizing the database engine for better performance across various workloads, resulting in faster query execution and improved overall database performance.
• InnoDB Improvements: MySQL 8.0 improved the InnoDB storage engine, offering enhanced transactional support, scalability, and data integrity, making it more robust for mission-critical applications.
• Persistent Configuration Changes: MySQL 8.0 introduced persistently configured server settings using SET PERSIST and SET PERSIST_ONLY SQL statements, ensuring settings remain retained even after server restarts, simplifying server configuration management.
• Improved Security: MySQL 8.0 enhances security by introducing password policies, user authentication improvements, and the caching_sha2_password authentication plugin, thereby protecting against unauthorized access and data breaches.
• Resource Management: MySQL 8.0 enhances resource management, allowing better control over system resources like memory and CPU usage, ensuring efficient and responsive database operation even under heavy workloads.
• Geospatial Enhancements: MySQL 8.0 extended its features, supporting geographic JSON objects and boosting spatial indexing. These changes make interacting with geographic data and running spatial inquiries easier.
• Windowing Functions: MySQL 8.0 introduced window functions that facilitate analytical calculations by allowing computations across rows related to the current row in query results. This function is valuable for data analytics and reporting.
• Enhanced Grouping: MySQL 8.0 introduces ROLLUP and CUBE extensions to the GROUP BY clause, providing multi-level grouping and subtotals in query results. This makes it easier to build summary reports and examine data at different degrees of granularity.
• Persistent Auto-increment Values: MySQL 8.0 offered the ability to persist auto-increment values between server restarts. This feature eliminates the chance of duplicate key conflicts and assures consistency in auto-generated keys.
• Performance Schema Enhancements: MySQL 8.0 featured changes to the Performance Schema, enabling enhanced monitoring and performance analysis tools for database administrators. This feature is critical for discovering and addressing performance bottlenecks in the database system.

What are the features deprecated in MySQL 8.0?

• Partitioning by KEY or HASH: In MySQL 8.0, using KEY or HASH partitioning was discouraged in favor of the more adaptable and effective RANGE and LIST partitioning techniques.
• Performance Schema Table-based Timers: As they were discovered to have little practical use or the potential to affect performance negatively, some Performance Schema Table-based timers were deprecated.
• MyISAM Storage Engine: The MyISAM storage engine, though still included in MySQL 8.0, is now regarded as deprecated in favour of the InnoDB storage engine, the standard and suggested engine for most use cases.
• Various SQL Modes: Some SQL modes and SQL mode combinations were deprecated to standardize and streamline SQL behavior. As an illustration, the ANSI_QUOTES SQL mode has been replaced with the ANSI_QUOTES mode.
• TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP: Use of explicit triggers is advised instead of the deprecated TIMESTAMP column default value of CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP.
• Query Cache: MySQL 8.0 deprecated and eliminated the query cache functionality, which cached query results. It was changed out for scalable and more effective query-processing techniques.
• Partitioning with a NULL Default Value: Due to potential problems with data consistency and performance, partitioning with a column that has a NULL default value is no longer recommended in MySQL 8.0.
• Old Password Hashing: In favor of more secure password hashing techniques, the OLD_PASSWORD () and PASSWORD () functions were deprecated.
• LOAD DATA LOCAL INFILE: The LOAD DATA LOCAL INFILE statement has been deprecated for security reasons. It is still available, but caution and the right security precautions should be taken when using it.
• SHOW ENGINE Syntax: In MySQL 8.0, several SHOW ENGINE statements and associated variables were marked as deprecated; they might be eliminated in later releases.

What are the features removed from MySQL 8.0?

• Query Cache: MySQL 8.0 completely deleted the Query Cache feature, which cached query results. This choice was chosen because the query cache could cause performance hiccups and scalability problems in scenarios with many concurrent users.
• Table-based Performance Schema Timers: To streamline and simplify the Performance Schema, MySQL 8.0 deleted some table-based Performance Schema timers and the functionality that went along with them.
• Different SQL Modes: To standardize and simplify SQL behavior, MySQL 8.0 removed some outdated SQL modes and SQL mode combinations. As an illustration, the ANSI_QUOTES SQL mode was replaced with the ANSI_QUOTES mode.
• Old Password Hashing: In MySQL 8.0, the OLD_PASSWORD () and PASSWORD () functions used for password hashing were eliminated since they were deemed less secure than current password hashing techniques.
• PARTITION by KEY or HASH: MySQL 8.0 lost the ability to partition tables using the KEY or HASH techniques. The use of more adaptable partitioning techniques like RANGE or LIST is advised.
• Partitioning with a NULL Default Value: Due to potential problems with data consistency and performance, MySQL 8.0 disabled partitioning using columns with NULL default values.
• SHOW ENGINE Syntax: Several SHOW ENGINE statements and associated variables were eliminated in MySQL 8.0, and their functionality may no longer be supported in more recent releases.
• Symbolic Links for MyISAM Tables: MySQL 8.0 removed symbolic links.
• Support for NDB Cluster for ndbmemcache: In MySQL 8.0, support for the ndbmemcache storage engine was dropped for MySQL Cluster (NDB Cluster).
• LOAD DATA LOCAL INFILE: Due to security concerns, MySQL 8.0 prohibited the usage of LOAD DATA LOCAL INFILE for loading data from client files. With the right configuration and security safeguards, it can still be utilized.