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Oracle 1z1-071 exam, also known as the Oracle Database SQL exam, is a certification test that validates the knowledge and skills of individuals in using SQL to interact with Oracle Database. Passing 1z0-071 Exam demonstrates that an individual has a strong foundation in SQL and is capable of performing basic database operations.

Oracle Database SQL Sample Questions (Q259-Q264):

NEW QUESTION # 259
Which two statements are true about sequences created in a single instance database? (Choose two.)

A. When a database instance shuts down abnormally, the sequence numbers that have been cached but not used would be available once again when the database instance is restarted
B. DELETE <sequencename> would remove a sequence from the database
C. CURRVAL is used to refer to the last sequence number that has been generated
D. The numbers generated by a sequence can be used only for one table
E. When the MAXVALUE limit for a sequence is reached, you can increase the MAXVALUE limit by using the ALTER SEQUENCE statement

Answer: C,E

Explanation:
Gaps in the Sequence
Although sequence generators issue sequential numbers without gaps, this action occurs independent of a commit or rollback. Therefore, if you roll back a statement containing a sequence, the number is lost.
Another event that can cause gaps in the sequence is a system crash. If the sequence caches values in memory, those values are lost if the system crashes. Because sequences are not tied directly to tables, the same sequence can be used for multiple tables.
However, if you do so, each table can contain gaps in the sequential numbers.
Modifying a Sequence
If you reach the MAXVALUE limit for your sequence, no additional values from the sequence are allocated and you will receive an error indicating that the sequence exceeds the MAXVALUE. To continue to use the sequence, you can modify it by using the ALTER SEQUENCE statement To remove a sequence, use the DROP statement:
DROP SEQUENCE dept_deptid_seq;

NEW QUESTION # 260
View the exhibit and examine the ORDERStable.
ORDERS
Null? Type
Name
ORDER ID NOT NULL NUMBER(4)
ORDATE DATE DATE
CUSTOMER ID NUMBER(3)
ORDER TOTAL NUMBER(7,2)
The ORDERStable contains data and all orders have been assigned a customer ID. Which statement would add a NOTNULLconstraint to the CUSTOMER_IDcolumn?

A. ALTER TABLE orders
ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
B. ALTER TABLE orders
MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
C. ALTER TABLE orders
MODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);
D. ALTER TABLE orders
ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;

Answer: C

NEW QUESTION # 261
The PRODUCT_INFORMATIONtable has a UNIT_PRICEcolumn of data type NUMBER (8, 2).
Evaluate this SQL statement:
SELECT TO_CHAR(unit_price, '$9,999') FROM product_information;
Which two statements are true about the output? (Choose two.)

A. A row whose UNIT_PRICEcolumn contains the value 10235.99will be displayed as $1,023.
B. A row whose UNIT_PRICEcolumn contains the value 10235.99will be displayed as $1,0236.
C. A row whose UNIT_PRICEcolumn contains the value 1023.99will be displayed as $1,023.
D. A row whose UNIT_PRICEcolumn contains the value 1023.99will be displayed as $1,024.
E. A row whose UNIT_PRICEcolumn contains the value 10235.99will be displayed as #######.

Answer: D,E

NEW QUESTION # 262
Examine the structure of the BOOKS_TRANSACTIONStable:
Name Null? Type
- --------------- ----------------- ---------------------------
TRANSACTION_ID NOT NULL VARCHAR2 (6)
BORROWED_DATE VARCHAR2 (50)
DUE_DATE DATE
BOOK_ID DATE
MEMBER_ID VARCHAR2 (6)
You want to display the member IDs, due date, and late fee as $2 for all transactions.
Which SQL statement must you execute?

A. SELECT member_id 'MEMBER ID', due_date 'DUE DATE', '$2 AS LATE FEE' FROM BOOKS_TRANSACTIONS;
B. SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", '$2' AS "LATE FEE" FROM BOOKS_TRANSACTIONS;
C. SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", $2 AS "LATE FEE" FROM BOOKS_TRANSACTIONS;
D. SELECT member_id AS MEMBER_ID, due_date AS DUE_DATE, $2 AS LATE_FEE FROM BOOKS_TRANSACTIONS;

Answer: B

NEW QUESTION # 263
Which four statements are true regarding primary and foreign key constraints and the effect they can have on table data?

A. It is possible for child rows that have a foreign key to remain in the child table at the time the parent row is deleted.
B. A table can have only one primary key and one foreign key.
C. It is possible for child rows that have a foreign key to be deleted automatically from the child table at the time the parent row is deleted
D. Primary key and foreign key constraints can be defined at both the column and table level.
E. The foreign key columns and parent table primary key columns must have the same names.
F. A table can have only one primary key but multiple foreign keys.
G. Only the primary key can be defined at the column and table level.

Answer: A,C,D,F

NEW QUESTION # 264
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