Question: SUBJECT: Database Systems Please choose the BEST answer for each question: Question 16: In SQL, a question or task asked by an end user of

SUBJECT: Database Systems

Please choose the BEST answer for each question:

Question 16: In SQL, a question or task asked by an end user of a database is called a _____.

query
action
update
request

Question 17: In SQL, a type of operation used to yield results from two different tables based on specified criteria is called a _______.

blend
query
join
select statement

Question 18: What is a NULL in a database?

A blank field
A field with a very low value
The absence of a value
A field that has been deleted

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