Hi, thanks for the reply!
It would be great if it was 1-to-1 but this project is just one more small step of a longer path. Basically this is a consequence of a merger between two companies and now they are reengeneering, adapting and reorganizing their business processes. In this case in particular I'm migrating the data to a new system where some of the business rules are new or different. This is actually the real and interesting challenge of this project: to be able to execute a migration and ensuring that all keeps working as usual. Basically the number of applications that communicate with the one I'll be migrating is considerable and some of the business rules may impact the ability to migrate some of the data on a given date, so a one shot migration is also off the table. It will surely be an interesting project :)
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