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Which is the best to identify the accuracy of account balances moved from a legacy database to a new one?
Compare the control totals of all of the transactions.
Perform sample testing of the migrated account balances.
Compare the hash total before and after the migration.
Validate that the number of records is the same for both databases.
Performing sample testing of the migrated account balances will involve the comparison of a selection of individual transactions from the database before the migration. The hash total will only validate the data integrity at a batch level rather than at a transaction level. Databases are composed of records that can contain multiple fields. The number of records will not allow an IS auditor to ascertain whether some of these fields have been successfully migrated. Comparing the control totals does not imply that the records are complete.
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