READ Free Dumps For Oracle- 1z1-051

Question ID 4725	Which statement is true regarding the UNION operator? Select all that apply.
Option A	A.    NULL values are not ignored during duplicate checking
Option B	B.    Names of all columns must be identical across all SELECT statements
Option C	C.    By default, the output is not sorted
Option D	D.    The number of columns selected in all SELECT statements need to be the same
Correct Answer	A,D

Explanation

Question ID 4726	Evaluate the following SQL statements: Exhibit:   Which ORDER BY clauses are valid for the above query? (Choose all that apply.)
Option A	A.    ORDER BY "CUST_NO"
Option B	B.    ORDER BY "Last Name"
Option C	C.    ORDER BY CUST_NO
Option D	D.    ORDER BY 2,cust_id
Option E	E.    ORDER BY 2,1
Correct Answer	B,D,E

Explanation

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