A.2

B.9

C.6

D.5

A.To assign variables to one or more attributes

B.To convert the data types of input parameters

C.To pass variable values to external value help views

D.To push down filters to the lowest level calculation views

A."Null"

B."?"

C."0"

D.<empty string>

A.To hide columns that are not required

B.To ensure semantic correctness

C.To force filters to apply at the lowest node

D.To avoid duplicate rows in the output

A.When the table is created

B.When partitions are regenerated

C.When a backup is started

D.When a delta merge is triggered

E.Question