Summarizing values from one table in another

[Heavy_Sound]

I have a users table which has a user_id and points field. I have a points_events table which logs each time a user_id receive points for an action

I need the points field in the users table to sum the total points associated with that user_id from the records in the points_events table.

How can I do this? I need it to be as automatic as possible. Thanks for any help you can offer!

[Kamille_Parks]

Assuming your user_id field in the points_events table is a Link to Another Record type field, your points in your users table could be a Rollup field with a SUM(values) aggregation.

Airtable - Support

Rollup field overview

  A rollup field performs calculations or formulas on specific cells from records that are linked to another field in your table. Sound complicated? It’s not! Watch this video guide and get started...

[Heavy_Sound]

Thanks so much for your response! This makes intuitive sense to me, but will I be able to POST records to points_events that automatically link to user_id in the users table?

[Kamille_Parks · Accepted solution]

If you’re referring to adding records via the API, I think Link Records fields take an array of record IDs. So this is possible, you’ll just need to do some extra work finding the record id for matching user_id values in the users table.