These comparison support articles are necessary to determine compatibility and requirements.
FileMaker Pro version comparison
https://support.claris.com/s/article/FileMaker-Pro-Version-Comparison?language=en_US
FileMaker Server version comparison
https://support.claris.com/s/article/FileMaker-Server-Version-Comparison?language=en_US
FileMaker 19 version comparison
https://help.claris.com/en/pro-help/content/new-features.html
FileMaker Pro System Requirements and Compatibility Comparison
FileMaker Server to FileMaker Cloud solutions comparison
FileMaker Server to FileMaker Cloud technical comparison
https://support.claris.com/s/article/Claris-FileMaker-19-Technical-Specifications?language=en_US
ODBC data sources/drivers are supported with External SQL Data Sources comparison