Relation for Google Sheets

Relation for Excel is about to be ported to Google Sheets.

This sheet has user defined functions to make simple relational algebra.
It uses the same syntax as Relation for Excel, with the following exception: expressions are made in Javascript, not in formula language.
The fun part: The functions work also on Sheets on iPad.
You can save a copy of the sheet to use the functions
This is work in progress

For the moment, the functions are embedded in the sheet, but it should be later an add-in.

You can copy the sheet from