Free Access Oracle.1z0-071.v2023-05-08.q154 Practice Test (Page 30)

Question 141

Examine the commands used to createDEPARTMENT_DETAILS andCOURSE_DETAILS:

You want to generate a list of all department IDs along with any course IDs that may have
been assigned to them.
Which SQL statement must you use?
A)

A.Option A

B.Option C

C.Option B

D.Option D

Question 142

Which three statements are true regarding group functions? (Choose three.)

A.They can be used on columns or expressions.

B.They can be passed as an argument to another group function.

C.They can be used with a SQL statement that has a GROUP BY clause.

D.They can be used only on one column in the SELECT clause.

E.They can be used together with the single-row functions in the SELECT clause.

Question 143

View the Exhibit and examine the structure in the EMPLOYEES tables.

Evaluate the following SQL statement:
SELECT employee_id, department_id
FROM employees
WHERE department_id= 50 ORDER BY department_id
UNION
SELECT employee_id, department_id
FROM employees
WHERE department_id=90
UNION
SELECT employee_id, department_id
FROM employees
WHERE department_id=10;
What would be the outcome of the above SQL statement?

A.The statement would not execute because the ORDER BY clause should appear only at the end of the SQL statement, that is, in the last SELECT statement.

B.The statement would not execute because the positional notation instead of the column name should be used with the ORDER BY clause.

C.The statement would execute successfully and display all the rows in the ascending order of DEPARTMENT_ID.

D.The statement would execute successfully but it will ignore the ORDER BY clause and display the rows in random order.

Question 144

Which two are true about constraints?

A.All constraints can be defined at the table or column level.

B.A constraint can be disabled even if the constrained column contains data.

C.Constraints are enforced only during insert operations.

D.A column with a unique constraint can contain a null value.

E.A column with a FOREIGN key constraint can never contain a null value.

Question 145

Which statement correctly grants a system privilege?

A.GRANT ALTER TABLE
TO PUBLIC;

B.GRANT CREATE TABLE
TO user1, user2;

C.GRANT CREATE SESSION
TO ALL;

D.GRANT CREATE VIEW
ON table1 TO
user1;

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Question 141

Question 142

Question 143

Question 144

Question 145

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