How to stop user from entering value for already existing data
We have a situation , where we need to give user a template for entering the data and then send it to the database. But we want that if user has already entered the value for a combination, then he should not be allowed to select the same combination again in that template.
In other words , there should be write access but not update access.
So I have two questions related to it:
1. How to build report with giving user , the drop-down list of available members under each dimensions. (I know that we can provide list by writing all of them in excel and then using those values in drop-down)
2. How to restrict the user for selecting the combination which has already been selected.
Need your suggestion