# Create recommendation list
**URL:** https://community.glideapps.com/t/create-recommendation-list/62036
**Category:** Ask for Help
**Created:** [May 23, 2023, 2:19am UTC](https://community.glideapps.com/t/create-recommendation-list/62036 "2023-05-23T02:19:21Z")
**Posts on this page:** 4
**Page:** 2
### Author:  [@George\_Pillari](https://community.glideapps.com/u/George_Pillari)
#### Post date: [May 24, 2023, 11:59am UTC](https://community.glideapps.com/t/create-recommendation-list/62036/21 "2023-05-24T11:59:59Z")
I took the easy path in initially setting up the allbooks table with each row representing anytime a user selected a title, so there are many rows for the same title. I need to redesign the table so each row represents a unique title and have a column that includes all of the users that have selected that title…right?
Thank you
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### Author:  [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)
#### Post date: [May 24, 2023, 12:57pm UTC](https://community.glideapps.com/t/create-recommendation-list/62036/22 "2023-05-24T12:57:10Z")
I thought we solved that issue in your earlier question related to this App?
> [@Add row only if it does not exist](https://community.glideapps.com/t/add-row-only-if-it-does-not-exist/61728):
>
> In one table I have a list of book selections by readers. Each row represents a book and a user. When multiple user select the same book, there are multiple rows added. Works fine. I have created a roll-up table that counts how many times each book is in the books table. I cannot figure out how to add the book to the roll-up table at the same time it is added to the books table without creating redundant rows in the roll-up table. The logic would be something like, “if book already exists …
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### Author:  [@George\_Pillari](https://community.glideapps.com/u/George_Pillari)
#### Post date: [May 24, 2023, 1:18pm UTC](https://community.glideapps.com/t/create-recommendation-list/62036/23 "2023-05-24T13:18:52Z")
Yes we did. I spoke too soon.
Thank you
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### Author:  [@system](https://community.glideapps.com/u/system)
#### Post date: [May 25, 2023, 1:19pm UTC](https://community.glideapps.com/t/create-recommendation-list/62036/24 "2023-05-25T13:19:50Z")
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