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Word documents will be saved to the cloud automatically on Windows going forward
(techcommunity.microsoft.com)
This is a most excellent place for technology news and articles.
What do you mean? I'm assuming you aren't referring to LibreOffice Calc, as that entire program is tables. LibreOffice Writer also lets you put tables in documents.
If you mean you want to use spreadsheets like a database? Here is an article on it: Calc as a Database
LibreOffice also includes Base, while it's now missing in some 365 editions.