To automate action whenever there is changes in another table

[chiukim]

I have 2 tables:
1. appsheet_i_usage
2. appsheet_i_odometer


I have an action (set values of some columns in this row) - [batch_id] in the table appsheet_i_usage. 
I want to achieve that this action will take effect only if there is addition of rows in the table appsheet_i_odometer. 

[Marc_Dillon]

Your problem may be much more simply solved with an Initial Value.

https://help.appsheet.com/en/articles/961507-app-formulas-and-initial-values

If not, you should provide many more details, because what you're doing doesn't make much sense.