I'm working with two databases and I want a column in table1 of the first database to make reference
to a row in table2 in the second database. I'm asking if I could create a view to select columns from
database1 and database2, is it possible?
I'm working with two databases and I want a column in table1 of the first database to make reference
to a row in table2 in the second database. I'm asking if I could create a view to select columns from
database1 and database2, is it possible?
Eclipse サイトのサンプルは試されましたか?
http://wiki.eclipse.org/EclipseLink/Examples/JPA/Composite
複合パターンを使用すると、2 つ以上の永続ユニットを組み合わせて単一の永続ユニットにできます。