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The Oracle 1z1-071 Exam is designed to test a candidate's ability to work with SQL in Oracle Database 12c. It is a valuable certification for individuals who want to enhance their skills and knowledge in SQL and Oracle Database administration. Oracle Database SQL certification is recognized globally and is highly valued by employers.

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Oracle Database SQL Sample Questions (Q283-Q288):

NEW QUESTION # 283
Which two statements are true about Entity Relationships?

A. A one-to-one relationship is always a self-referencing relationship
B. A many-to-many relationship can be implemented only by using foreign keys
C. A table name can be specified just once when selecting data from a table having a selfreferencing relationship
D. A Relationship can be mandatory for both entities
E. A one-to-many relationship in one direction is a one-to-one relationship in the other direction

Answer: B,D

NEW QUESTION # 284
Which three statements are true about views in an Oracle Database?

A. A view can be created that refers to a non-existent table in its defining query.
B. Views have no segment.
C. Views can join tables only if they belong to the same schema.
D. Views have no object number.
E. Rows inserted into a table using a view are retained in the table if the view is dropped.
F. A SELECT statement cannot contain a WHERE clause when querying a view containing a WHERE clause in its defining query.

Answer: A,C,D

NEW QUESTION # 285
View the Exhibit and examine the data in ORDERS_MASTER and MONTHLYjDRDERS tables.

Evaluate the following MERGE statement:
MERGE INTO orders_master o USING monthly_orders m ON (o.order_id = m.order_id) WHEN MATCHED THEN UPDATE SET o.order_total = m.order_total DELETE WHERE (m.order_total IS NULL) WHEN NOT MATCHED THEN
INSERT VALUES (m.order_id, m.order_total);
What would be the outcome of the above statement?

A. The ORDERS MASTER table would contain the ORDER IDs 1,2,3 and 4.
B. The ORDERS_MASTER table would contain the ORDERJDs 1,2 and 3.
C. The ORDERS_MASTER table would contain the ORDERJDs 1,2 and 4.
D. The ORDERS_MASTER table would contain the ORDERJDs 1 and 2.

Answer: C

NEW QUESTION # 286
An Oracle database server session has an uncommitted transaction in progress which updated 5000 rows
in a table.
In which three situations does the transact ion complete thereby committing the updates?

A. When a CREATE TABLE AS SELECT statement is executed unsuccessfully in the same session
B. When a DBA issues a successful SHUTDOWN IMMEDIATE statement and the user then issues a COMMIT
C. When the session logs out is successfully
D. When a COMMIT statement is issued by the same user from another session in the same database instance
E. When a DBA issues a successful SHUTDOWN TRANSACTIONAL statement and the user, then issues a COMMIT
F. When a CREATE INDEX statement is executed successfully in same session

Answer: C,E,F

NEW QUESTION # 287
Which three statements are true about the DESCRIBE command?

A. It can be used only from SQL*Plus.
B. It displays the NOT NULL constraint for any columns that have that constraint.
C. It can be used to display the structure of an existing view.
D. It can be used from SQL Developer.
E. It displays all constraints that are defined for each column.
F. It displays the PRIMARY KEY constraint for any column or columns that have that constraint.

Answer: B,C,D

Explanation:
A: True. The DESCRIBE command can indeed be used from SQL Developer as well as other Oracle database tools such as SQL*Plus. This command is used to display the structure of a table, view, or other object, showing information such as column names, data types, and whether a column is nullable.
B: True. The DESCRIBE command can be used to display the structure of an existing view, showing similar information as it would for a table. This includes the columns, their data types, and other pertinent details.
D: True. When DESCRIBE is used, it does display the NOT NULL constraints for columns that have this constraint. This is part of the basic information about the structure of a table or view that can help developers understand the requirements of the data stored therein.

NEW QUESTION # 288
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