I have a table with fields
EmployeeID
blahblah
blahblah2
…..
RecordMonth
RecordYear
- so each employee should only have a matching entry for a month, year, Emp#. How do I set up a table.
So how do I set up the table so that EmployeeID can be updated once a month but can never have two entries for a matching month and year?
Best Answer
Use a compound primary key:
And if your table already exists, drop the old primary key:
And recreate it: