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READ Free Dumps For Oracle- 1z0-001





Question ID 1530

You attempt to query the database with this command:
SELECT name, salary
FROM employee
WHERE salary =
(SELECT salary
FROM employee
WHERE last_name = 'Wagner' OR dept_no = 233);
Why could this statement cause an error?
 

Option A

A.    A single row subquery is used with a multiple row comparison operator.
 

Option B

B.    A multiple row subquery is used with a single row comparison operator.
 

Option C

C.    Logical operators are not allowed in the WHERE clause.

 

Option D

D.    Subqueries are not allowed in the WHERE clause.

Correct Answer B
Explanation


Question ID 1531

Which statement shows the view definition of the view EMP VIEW that is created based on the table EMP?

Option A

SELECT text

FROM user
_    views

WHERE view_name = 'EMP_VIEW';
 

Option B

B.    DESCRIBE VIEW emp_view
 

Option C

C.    SELECT view text
FROM my_views
WHERE view_name = 'EMP_VIEW';
 

Option D

D.    DESCRIBE emp
 

Option E

E.    SELECT view text
FROM TABLE emp
WHERE view_name = 'EMP_VIEW';
 

Correct Answer A
Explanation

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