# Bar code reader **URL:** \ **Category:** Ask for Help\ **Created:** [March 2, 2021, 6:26pm UTC](https://community.glideapps.com/t/bar-code-reader/23669 "2021-03-02T18:26:09Z")\ **Posts on this page:** 1\ **Showing post:** 24
**Author:** ![Jeff\_Hager](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/jeff_hager/32/43_2.png) [@Jeff\_Hager](https://community.glideapps.com/u/Jeff_Hager)\ **Post date:** [March 3, 2021, 11:03pm UTC](https://community.glideapps.com/t/bar-code-reader/23669/24 "2021-03-03T23:03:54Z")
You can only set a column value in a single row. If you know that you would only have 5 rows to update, you could create 5 single relations linking AA to each A1-A5 column. The you could have 5 set column actions to set the S1 boolean value on each row. through each individual relation. I have what a feel is a better alternative here. > [@Reset Multiple Rows At Once](https://community.glideapps.com/t/reset-multiple-rows-at-once/22211): > > There have been several requests for people to find a way to clear a value in multiple rows. I was thinking about that and came up with a quick example of a way to handle that. Instead of trying to clear a value in an entire column, I realized we could just change one value on a parent column, load it as a single value in our sheet and then compare that parent value to a column that we set or unset for each row. It’s not about clearing an entire column, it’s about making a value in each row n… --- _[View the full topic](https://community.glideapps.com/t/bar-code-reader/23669)._