Decrease (Update) column on Users table
I will have the concept of 'actions'. And when user taps to train, edit something, etc. those actions will be decreasing from him and after the day is over they will be reset back to max.
My problem is, how can I decrease that actions column (per User) like it was an atomic counter, because user can perform X requests at same time and I need to make sure that proper amount of actions are decreased.
Thanks for the help,