Foreign Key relationship between two databases - Mailing list pgsql-general

Hi,
    I am using postgres 7.3.4. I am new to postgres.
    I can give foreign key relationship between two tables of same database. Can I give foreign key relationship
betweentables of two databases ? Plz, let me know if possible & send me how can I do that?  

Thanks & Regards,
Sandeep.

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