Installing MariaDB Windows ZIP Packages
Users need to run mysql_install_db.exe, without parameters to create a data directory, e.g
Then you can start server like this
C:\zip_unpack\directory> bin\mysqld.exe --console
For very old distributions (10.3 and earlier), a prebuilt data directory is already provided.
If you like to customize the server instance (data directory, install as service etc), please refer to mysql_install_db.exe documentation