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Question ID 1698

What is true regarding subqueries?

Option A

A.    The inner query must always return a value or the outer query will give an error.
 

Option B

B.    The inner query returns a value to the outer query.

 

Option C

C.    The inner query always sorts the results of the outer query.
 

Option D

D.    The outer query must return a value to the inner query.
 

Option E

E.    The outer query always sorts the results of the inner query.

Correct Answer B
Explanation


Question ID 1699

Which four are attributes of single row functions? (Choose four.)

Option A

A.    accept only one argument and return only one value
 

Option B

B.    cannot be nested
 

Option C

C.    manipulate data items

 

Option D

D.    act on each row returned
 

Option E

E.    return one result per row
 

Option F

F.    accept arguments which can be a column or an expression

Correct Answer C,D,E,F
Explanation

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