Darryl wrote:

Where I work, if over time an application grows to be very large, the
management sometimes wants to move the project to our large Oracle
servers...

They would laugh at me and ask me why I had ever used that database in the
first place....

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Let me get this straight. You are willing to create the shadow fields and
write the triggers to implement a solution in FB/IB but you are not willing to
do it when the theoretical time comes to move the database to another RDBMS
because you will be embarrassed? Does this really make sense?