Primary Key
A primary key is a key
that is used to identify a
record
within a table
.
A primary key is always a unique key
and cannot have a "NULL" value.
Primary keys make each record
unique and identifiable. While most tables have a primary key it
is not absolutely necessary.
Openoffice.org Base
lets you mark the primary key whenever you
create a table in a database.
See also
Placing the primary key
The following screencasts demonstrate how to create a new table with a primary key:
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