I don't think so. A table can have only one primary key although it may be constructed using multiple fields.


On 21 Jun 2007, at 21:24, first last wrote:

A few lines under the heading "Primary key and unique constraints" in the Derby Reference Manual, the documentation says: "A table can have at most one PRIMARY KEY constraint, but can have multiple UNIQUE constraints.".
However more than one primary key is allowed on a table I believe?