Which capability provides visibility to data joined between multiple tables?
A database view defines table joins for reporting purposes.
For example, a database view can join the Incident table to the Metric Definition and Metric Instance tables. This view can be used to report on incident metrics and may include fields from any of these three tables.
https://www.servicenow.com/docs/bundle/utah-application-development/page/use/reporting/concept/c_DatabaseViews.html