Syncronization the data between tow tables

Question

hii
i have two database database 1 and database 2 the both database have table citizen(citizen_ssn, citizen_name ) with the same structure
ok ,
and i create database link from database 1 to database 2 (link name : link1 )
and i create another link fro database 2 to database 1 (link name :link2 )
i want to synchronize data between the two tables
in other word i want when new record add to database1 go to database2 and check if that recrod exist(use citizen_ssn) or not if it exist then add the record only in database1
if not add the record in database1 and database2,
and if there is record inserted in database 2 i will go to database1 and check if it exist if it exist add the record in database2 if not add it in database1 and database2
can i do that in real time or not .
thank you ..........

Answer 1

i think it will be the same senario
after insert in database 1 go to database 2 and then the befor insert trigger will fire
and check if the citizenssn is in the table or not
if not then insert the record
and the trigger in database 2 after insert will fire and go to batabase 1 to insert the same record and in database 1 the befor insert trigger will fire and so on
the same infinity loop
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