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A fairly common event in a database's lifecycle is that of the migration from version "older" to version "newer." Migrating from one version to another may be as simple as exporting the old and importing into the new, but chances are there is a lot more involved than first meets the eye. It is not uncommon to also incorporate other significant changes such as an operating system change, a schema modification, and changes to related applications. Each change has its own inherent risk, but lumping them together in one operation flies in the face of common sense, even more so without having tested the migration from start to end. Amazingly, this situation occurs all too often.
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