That is why my suggestion is to use combobox. If you need to view only these values without editing, then you could use also calculated field:
SELECT IIF(MyShortField="L", "Local", "Dollar") as MyFullField ...

>But the problem with that is after u select the options using the space bar or the first letter and move out it is setting to the first option (value) in the list and also at the run time i can't able the change options according to the value stored in the table.