What is the purpose of logs for activities in civicrm_log table?
Under Administer - CiviReport - Create Report From Template there is one called &quot;Database Log Report&quot;. That shows you more or less what's in civicrm_log.
For advanced logging (at Administer - System Settings - Misc - Logging), which I don't think is what you're talking about but just in case, the lack of an activity report is a known issue. The advanced logging Contact logging report does not always show proper logs for non-Contact records.