I would like to update two databases located at two different physical locations to be able to update the Registration...
This question depends too much on the actual database software in use. At a minimum, you should consider the case where one of the updates fails -- this usually requires wrapping the update statements in a transaction block that the database can roll back. This scenario can be implemented in many ways, depending on the software available. Here's some pseudocode --
BEGIN DISTRIBUTED TRANSACTION doubleup UPDATE Table1SQLServer SET Registration = "foobar" IF ERROR THEN ROLLBACK DISTRIBUTED TRANSACTION doubleup UPDATE Table2Oracle SET Registration = "foobar" IF ERROR THEN ROLLBACK DISTRIBUTED TRANSACTION doubleup COMMIT DISTRIBUTED TRANSACTION doubleup
Check with your Database Administrator for specifics concerning your installation.
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