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How can you ensure data integrity can be maintained in your database?
Wiki User
∙ 14y ago
Data integrity is preserved by encapsulating unit-of-work actions, such as a transfer from one account to another, in a transaction.
The database implementation ensures that either all of the transaction commits, or none of it commits. In the event of a failure and restart of the database, all incomplete transactions are uncommitted, i.e. rolled back.
While the transaction is in-flight, any query to data elements used by the transaction reliably retrieve the value they allhad prior to transaction start. Also, any transaction attempting to lock any of those elements for other unit-of-work actions are forced to wait until the first transaction is complete.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoYou can ensure data integrity by deploying constraints, including foreign keys.
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