How should a database design change after records already exist?
Plan the data migration, update validation and application code, and verify representative existing records. A schema change needs an explicit transition rather than only an updated diagram.
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More FAQs in Why should database design be completed before application development?
No. Define the fields and relationships needed for the current scope, record important assumptions, and revise the design deliberately as implementation reveals new requirements.
It can expose unclear rules about shared organizers, event-specific attendance, guest identities, and task ownership. Resolving these questions early prevents different features from storing incompatible information.
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