# Math Column Connection

**URL:** <https://community.glideapps.com/t/math-column-connection/32315>\
**Category:** Ask for Help\
**Created:** [September 25, 2021, 4:51pm UTC](https://community.glideapps.com/t/math-column-connection/32315 "2021-09-25T16:51:33Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Darren\_Murphy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/darren_murphy/32/47326_2.png) [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)\
**Post date:** [September 26, 2021, 3:09am UTC](https://community.glideapps.com/t/math-column-connection/32315/5 "2021-09-26T03:09:56Z")

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Okay, so you’d add a [Single Relation](https://docs.glideapps.com/all/reference/data-editor/computed-columns/relation-column#single-relations) column to your Categories table, that joins the Category Name in that table to the Category Name in the Items table.  
Then create a [Lookup](https://docs.glideapps.com/all/reference/data-editor/computed-columns/lookup-column) column that fetches the value you need from the Items table via that relation.  
You can then use that second column in your math formula.

But your table structure still looks a little odd to me - what happens when you have multiple users, how do you know which bets apply to which users?

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_[View the full topic](https://community.glideapps.com/t/math-column-connection/32315)._