The dialer_detail table captures and reports on every attempt made to a customer, including personal callback. This is a historical table.
The only time data is inaccurately captured here is for customers using Avaya rather than CUCM. Some records might be written to the Dialer_Detail table for older G3 dialers, but the records should not be used.
The webview camqry01 report is a real time report and resets at midnight.
This only reports the disposition for a record and not every call attempt for that record.
The rows should not match as one is counting every attempt and one is counting the disposition of the record.