How to create a dynamic (calculated) link to another table?
There is a Table#1 (Daily Expenses) [ID, Date, Sum, subject,MonthNo].
Where MonthNo=MONTH({Date})
There is a Table#2 (Months of the year) just as follows:
MonthNo MonthName
1 January
2 February
3 March
etc.
Linking Table#1 to Table#2 will allow me to calculate monthly expenses directly in a Table#2 by means of Lookup(Sum) function.
How can I do this? If I choose a standard Link field then every time later I will have to select a MonthNo for each record in «Daily Expenses» manually instead of linking automatically. Manual input is such cases is unnecessary and harmful action, since it can often lead to mistakes.
