I would like to update two databases located at two different physical locations to be able to update the Registration...
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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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