what is Materialized view? What is a snapshot? what are the
similarities and differences between Materialized views and
snapshots?

Answer Posted / its me...

A materialized view is a database object that contains the
results of a query. The FROM clause of the query can name
tables, views, and other materialized views. Collectively
these objects are called master tables .
materialized views allow you to maintain copies of remote
data on your local node.
You can select data from a materialized view as you would
from a table or view.

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