An myi file extension is associated with the MySQL a relational database management system. An myi file stores database index.
Software that open myi file
MYI file extension - MySQL database index
What is myi file? How to open myi files?
File type specification:
Thy myi file extension is associated with the MySQL relational database management system (RDBMS).
These myi files are used by MySQL to store indexes for a MyISAM table. MySQL database index defines the structure of the table and contains the control mechanism to check integrity of tables.
The MySQL database index file is related to MySQL database data file (.myd file) and MySQL database metadata file (.frm file).
The default software associated to open myi file:
Company or developer:
Oracle Corporation
A popular open source relational database management system, MySQL is used on many Internet database servers. It is able to provide multi-user access to number of databases.
Company or developer:
Oracle Corporation
MySQL Enterprise Edition is commercial version of MySQL for business customers developed by Oracle. It is recommended version of MysQL for business-critical applications.
MySQL Enterprise Edition for Mac 
Company or developer:
Oracle Corporation
MySQL Enterprise Edition for Mac is commercial version of MySQL for business customers developed by Oracle. It is recommended version of MysQL for business-critical applications.
Company or developer:
Oracle Corporation
MySQL for Mac is popular open source relational database management system distributed under GNU General Public License that is used on many Internet database servers. It is able to provide multi-user access to number of databases.
MySQL Enterprise Edition for Linux 
Company or developer:
Oracle Corporation
MySQL Enterprise Edition for Linux is commercial version of MySQL for business customers. It includes most comprehensive set of advanced features and management tools.
Company or developer:
Oracle Corporation
MySQL for is popular open source relational database management system, developed by Oracle and distributed under GNU General Public License. It is used on many Internet database servers. It is able to provide multi-user access to number of databases.
List of recommended software applications associated to the .myi file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open myi file, edit myi file, convert myi file, view myi file, play myi file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with myi file - MySQL database index
Click on the software link(s) for more information. Suggested software applications use myi file type for internal purposes and/or also by different way than common edit or open myi file actions.
Microsoft Windows:
Main software associated with myi file by default:
MySQL
MySQL Enterprise Edition
Apple macOS / Mac OS X:
Main software associated with myi file by default:
MySQL Enterprise Edition for Mac
MySQL for Mac
Linux/Unix:
Main software associated with myi file by default:
MySQL Enterprise Edition for Linux
MySQL for Linux
