Sorted:

How does the Cacti system collect data and graphically display it?

Which data sources and plugins are supported by the Cacti system?

How does the data storage work in the Cacti system?

What are the common issues and solutions for the Cacti system?

How to create and manage graphs in the Cacti system?

How to configure alerting and notification mechanisms in the Cacti system?

How does the Cacti system handle user permission management and access control?

What is a union query in SQL Server?

What are views in SQL Server?

How to perform data migration in SQL Server?