When preparing to perform a data migration from one database to another, which of the following would be the BEST method to use if the goal is to maintain the integrity of the data and ensure that it can be imported into a database system with a different structure?
Flat file export of individual tables
Standard full database backup
Database dump specifically designed for cross-system migration
A database dump is the correct answer as it typically includes the complete data set as well as the database structure, which can be crucial when migrating to a different system. While backups and exports are also used for moving data, they often serve a different purpose or might be more system-specific. A flat file export, while it may seem like an appropriate choice, might not effectively maintain relational data integrity or the original database constraints when imported into a system with a different structure, thus making it a less optimal choice for complex migrations.
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What is a database dump and why is it important for migrations?
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What are the differences between a full database backup and a database dump?
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What issues might arise with flat file exports during a database migration?