CRM/CaseCaseActivitycivicrm_case_activityJoining table for case-activity associations.1.8trueCiviCase id int unsigned true Unique case-activity association id Number 1.8 id true case_id int unsigned true Case ID of case-activity association. Case 1.8 case_id civicrm_case id 1.8 CASCADE activity_id int unsigned true Activity ID of case-activity association. Activity 2.0 activity_id civicrm_activity id 2.0 CASCADE UI_case_activity_id case_id activity_id 2.0