# What do you want/need to learn from me and the other Ambassadors? **URL:** \ **Category:** Community Resources\ **Tags:** tutorial\ **Created:** [May 19, 2022, 1:10am UTC](https://community.glideapps.com/t/what-do-you-want-need-to-learn-from-me-and-the-other-ambassadors/42134 "2022-05-19T01:10:01Z")\ **Posts on this page:** 1\ **Showing post:** 10
**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:** [May 21, 2022, 3:47am UTC](https://community.glideapps.com/t/what-do-you-want-need-to-learn-from-me-and-the-other-ambassadors/42134/10 "2022-05-21T03:47:53Z")
> [@Darren\_Murphy](#): > > I think a useful tutorial might be one that shows people how to use joined lists to create one-to-many and/or many-to-many relations. This question is a perfect example of what I was getting at here. > [@Preventing Repetition on many to many relationship](https://community.glideapps.com/t/preventing-repetition-on-many-to-many-relationship/42222): > > hello everyone, i have the follows: Contractor table which accommodate: contractor name photo. it is always growing table Project table which accommodate: project name photo. it is always growing table too A table to act as container for many to many relationship named Contractor’s Project to accommodate: project name contractor name i want to prevent adding the same contractor from contractor table to the same project twice. i am using a selection component at the Contractor’s … --- _[View the full topic](https://community.glideapps.com/t/what-do-you-want-need-to-learn-from-me-and-the-other-ambassadors/42134)._