Question : Microsoft Acess 2007: Primary Key

Hi,

1) I am studying the Microsoft Access 2007
2) There are some objects of Microsoft Access, such as Table, Form, Query, etc
3) I saw a term called "Primary key" at a Table
4) My questions:
First: What is "Primary Key"? (Pls explain with your own wording and understanding; i do not need the links)
Second: This Primary key is ONLY for a Table? (or other OBJECTS such as Form, Query, Report, etc ........ALSO have a Primary key?)
Third: Other things related to Primary keys? please explain
5) Thank you

tjie

Answer : Microsoft Acess 2007: Primary Key

This explains it better than I could!
 The primary key of a relational table uniquely identifies each record in the table. It can either be a normal attribute that is guaranteed to be unique (such as Social Security Number in a table with no more than one record per person) or it can be generated by the DBMS (such as a globally unique identifier, or GUID, in Microsoft SQL Server). Primary keys may consist of a single attribute or multiple attributes in combination.
http://databases.about.com/cs/administration/g/primarykey.htm


Only Tables have primary keys, not other objects.

More Info

http://en.wikipedia.org/wiki/Unique_key

Gary