Free Access Oracle.1z0-071.v2023-10-02.q276 Practice Test (Page 56)

Question 271

Which three statements are true about views in an Oracle Database? (Choose three.)

A.Views have no segment.

B.Views have no object number.

C.A SELECT statement cannot contain a WHERE clause when querying a view containing a WHEREclause in its defining query.

D.Views can join tables only if they belong to the same schema.

E.A view can be created that refers to a non-existent table in its defining query.

F.Rows inserted into a table using a view are retained in the table if the view is dropped.

Question 272

Which statement is true about aggregate functions?

A.The AVG function implicitly converts NULLSto zero.

B.Aggregate functions can be nested to any number of levels.

C.The MAXand MINfunctions can be used on columns with character data types.

D.Aggregate functions can be used in any clause of a SELECTstatement.

Question 273

Examine the structure proposed for the TRANSACTIONS table:

Which two statements are true regarding the storage of data in the above table structure?
(Choose two.)

A.The CUST_STATUS column would allow storage of data up to the maximum VARCHAR2 size of 4,000 characters.

B.The TRANS_DATE column would allow storage of dates only in the dd-mon-yyyy format.

C.The CUST_CREDIT_VALUE column would allow storage of positive and negative integers.

D.The TRANS_VALIDITY column would allow storage of a time interval in days, hours, minutes, and seconds.

Question 274

SCOTTis a user in the database.
Evaluate the commands issued by the DBA:

Which statement is true regarding the execution of the above commands?

A.Statement 1 would not execute because the WITH GRANToption is missing.

B.Statement 2 would not execute because system privileges and object privileges cannot be granted together in a single GRANTcommand.

C.Statement 3 would not execute because role and system privileges cannot be granted together in a single GRANTstatement.

D.Statement 1 would not execute because the IDENTIFIED BY <password>clause is missing.

Question 275

Examine the description of the CUSTOMERS table:

CUSTNO is the PRIMARY KEY.
You must determine if any customers' details have been entered more than once using a different CUSTNO, by listing all duplicate names.
Which two methods can you use to get the required result?

A.LEFT OUTER JOIN with self join

B.RIGHT OUTER JOIN with self join

C.self join

D.FULL OUTER JOIN with self join

E.subquery

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Question 271

Question 272

Question 273

Question 274

Question 275

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