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Oracle 1z0-071 Exam, also known as the Oracle Database SQL exam, is a certification exam that tests the knowledge and skills of individuals in using SQL to manage and manipulate Oracle databases. Passing 1z0-071 exam is a requirement for individuals who wish to obtain the Oracle Database SQL Certification. Oracle Database SQL certification is highly valued in the technology industry and is recognized by employers worldwide.

Oracle Database SQL Sample Questions (Q268-Q273):

NEW QUESTION # 268
Evaluate the following SQL statements that are issued in the given order:
CREATE TABLE emp
( emp_no NUMBER(2) CONSTRAINT emp_emp_no_pk PRIMARY KEY,
ename VARCHAR2(15),
salary NUMBER (8,2),
mgr_no NUMBER(2) CONSTRAINT emp_mgr_fk REFERENCES emp(emp_no));
ALTER TABLE emp
DISABLE CONSTRAINT emp_emp_no_pk CASCADE;
ALTER TABLE emp
ENABLE CONSTRAINT emp_emp_no_pk;
What would be the status of the foreign key EMP_MGR_PK?

A. It would remain disabled and can be enabled only by dropping the foreign key constraint and recreating it.
B. It would remain disabled and has to be enabled manually using the ALTER TABLE command.
C. It would be automatically enabled and deferred.
D. It would be automatically enabled and immediate.

Answer: B

NEW QUESTION # 269
Which three are true about system and object privileges

A. Revoking an object privilege that was granted with the WITH GRANT OPTION clause has a cascading effect
B. WITH GRANT OPTION can be used when granting an object privilege to both users and roles
C. Adding a primary key constraint to an existing table in another schema requires a system privilege
D. Adding a foreign key constraint pointing to a table in another schema requires the REFERENCEs object privilege
E. Revoking a system privilege that was granted with the WITH ADMIN OPTION has a cascading effect.
F. WITH GRANT OPTION cannot be used when granting an object privilege to PUBLIC

Answer: A,B,D

Explanation:
A: True. The WITH GRANT OPTION allows the grantee to grant the object privileges they received to another user or role. This can be used for both system and object privileges, thereby extending the privilege chain.
D: True. When an object privilege granted with the WITH GRANT OPTION is revoked, it also revokes the privileges that the grantee had re-granted to others. This is referred to as a cascading effect, which can impact multiple users and roles depending on the extent of re-granting.
F: True. To add a foreign key constraint that references a table in another schema, the user must have the REFERENCES object privilege on the target table in the other schema. This privilege is specific and necessary for the integrity constraints involving foreign keys.

NEW QUESTION # 270
Which two statements are true about selecting related rows from two tables based on entity relationship diagram (ERD)?

A. An inner join relates rows within the same table.
B. Relating data from a table with data from the same table is implemented with a self join.
C. Implementing a relationship between two tables might require joining additional tables.
D. Rows from unrelated tables cannot be joined.
E. Every relationship between the two tables must be implemented in a Join condition.

Answer: B,C

NEW QUESTION # 271
Examine these statements which execute successfully:
ALTER SESSION SET NLS_DATE_FORMAT = 'DD-MON-YYYY HH24 MI: SS'
ALTER SESSION SET TIME_ ZONE = '-5:00';
SELECT DBTIMEZONE, SYSDATE FROM DUAL
Examine the result:

If LOCALTIMESTAMP was selected at the same time what would it return?

A. 11-JUL-2019 6,00,00,000000 AM
B. 11-JUL-2019 11,00,00,000000AM -05:00
C. 11-JUL-2019 6,00,00,00000000 AM - 05:00
D. 11-JUL-2019 11,00,00,00000000 AM

Answer: D

NEW QUESTION # 272
Which two statements are true about views?

A. Theethi CHEcK clause prevents certalin rows from being updated or inserted in the underying table through the view.
B. Views can be indexed.
C. Views can be updated without the need to re-grant privileges on the view.
D. Tables in the defining query of a view must always exist in order to create the view.
E. The wITH CHECK clause prevents certain rows from being displayed when querying the view.

Answer: C,D

Explanation:
Views in Oracle have specific properties regarding how they can be used and what limitations apply to them:
A; Oracle does not allow indexing directly on views. However, a view can display data from indexed tables.
B; The WITH CHECK OPTION clause on a view prevents DML operations that would result in rows that do not satisfy the view's filter criteria. It doesn't prevent certain rows from being updated or inserted in the underlying table through the view per se.
C; The tables (or other views) referenced in the creating query of a view must exist at the time the view is created, making this statement true.
D; Views do not require privileges to be re-granted when the view is updated; they are separate from the underlying object privileges, making this statement true.
E; The WITH CHECK OPTION clause is used to ensure that all data modifications through the view are consistent with the view's defining query, not to prevent rows from being displayed.
References:
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): "CREATE VIEW"
* Oracle Database Concepts, 12c Release 1 (12.1): "Views"

NEW QUESTION # 273
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