Dear team,
I need help for following.
As per the understanding; whenever any job/query is executed; most of the databases brings the data from physical files and put it into Database Cache.
Can you please let us know whether the data segment as well as index are copied when data is read from datafiles?
Also How come database engines knows whether requested data by any process (end user query to DB) is available in Cache. (this question may sound senseless but I do have doubt about it)
Regards,
Arthur