Unique visitors tracked by day?

I’m curious if Piwik tracks unique visitors by day? We’re using the piwik.php to force the visitor id (for clients that don’t support Javascript) to track visits.

Looking at the database (piwik_log_visit) we get :


idsite, idvisitor, visitor_localtime, visitor_returning, visitor_count_visits,visit_first_action, visit_last_action ...

'3', 123, '10:35:54', '0', '1', '2011-05-09 10:35:54', '2011-05-09 10:35:54' ....
'3', 456, '10:34:16', '0', '1', '2011-05-09 10:34:16', '2011-05-09 10:34:16' ....
'3', 111, '10:32:02', '1', '1', '2011-05-09 10:32:02', '2011-05-09 10:32:02' ....
'3', 111, '07:16:04', '0', '1', '2011-05-09 07:16:04', '2011-05-09 07:16:04' ....
'3', 111, '07:23:22', '0', '1', '2011-05-06 07:23:22', '2011-05-06 08:01:57' ....

Shouldn’t the last three lines be just one? Or is this the intended way of tracking users, as unique per day? If so, is there any support in the API:s for getting ‘globally’ unique hits for a visitor_entry_idaction_name?