Oracle 1Z0-047 問題集

質問 1：
Which three statements indicate the end of a transaction? (Choose three.)
A. after a SELECT statement is issued
B. after a ROLLBACK is issued
C. after a SAVEPOINT is issued
D. after a CREATE statement is issued
E. after a COMMIT is issued
正解：B,D,E

質問 2：
View the Exhibit and examine the structure of ORDERS and CUSTOMERS tables. Which INSERT statement should be used to add a row into the ORDERS table for the customer
whose CUST LAST NAME is Roberts and CREDIT LIMIT is 600?

A. INSERT INTO orders (order_id,order_date,order_mode,
(SELECT customer_id
FROM customers
WHERE cust_last_name='Roberts' AND
credit_limit=600) .order_total)
VALUES(1 ,'10-mar-2007', 'direct', &&customer_id, 1000);
B. INSERT INTO orders (order_id.order_date.order_mode,
(SELECT customer_id
FROM customers
WHERE cust_last_name='Roberts' AND
credit _limit=600) .order_total)
VALUES(1 ,'IO-mar-2007', 'direct', &customer_id, 1000);
C. INSERT INTO(SELECT o.order_id, o.order_date.o.orde_mode.c.customer_id, o.order_total
FROM orders o, customers c WHERE o.customer_id = c.customer_id
AND c.cust_last_name='Roberts'ANDc. Credit_limit=600) VALUES (1,'10-mar-2007', 'direct',(SELECT customer_id FROM customers WHERE cust_last_name='Roberts' AND Credit_limit=600), 1000);
D. INSERT INTO orders
VALUES (1,'10-mar-2007', 'direct',
(SELECT customer_id
FROM customers
WHERE cust_last_name='Roberts' AND
credit_limit=600), 1000);
正解：D

質問 3：
View the Exhibit and examine the data in ORDERS_MASTER and MONTHLY_ORDERS 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 and 2.
B. The ORDERS_MASTER table would contain the ORDER_IDs 1,2 and 3.
C. The ORDERS_MASTER table would contain the ORDER IDs 1,2,3 and 4.
D. The ORDERS_MASTER table would contain the ORDER_IDs 1,2 and 4.
正解：D

質問 4：
Evaluate the following CREATE SEQUENCE statement:
CREATE SEQUENCE seql START WITH 100
INCREMENT BY 10 MAXVALUE 200 CYCLE NOCACHE;
The sequence SEQ1 has generated numbers up to the maximum limit of 200. You issue the
following SQL statement:
SELECT seql.nextval FROM dual;
What is displayed by the SELECT statement?
A. 10
B. an error
C. 1
D. 100
正解：C

質問 5：
The first DROP operation is performed on PRODUCTS table using the following command: DROP TABLE products PURGE;
Then you performed the FLASHBACK operation by using the following command:
FLASHBACK TABLE products TO BEFORE DROP;
Which statement describes the outcome of the FLASHBACK command?
A. It recovers the table structure, data, and the indexes.
B. It recovers only the table structure.
C. It is not possible to recover the table structure, data, or the related indexes.
D. It recovers the table structure and data but not the related indexes.
正解：C

質問 6：
View the Exhibit and examine the data in EMP and DEPT tables.
In the DEPT table, DEPTNO is the PRIMARY KEY.
In the EMP table, EMPNO is the PRIMARY KEY and DEPTNO is the FOREIGN KEY referencing
the DEPTNO column in the DEPT table.
What would be the outcome of the following statements executed in the given sequence?
DROP TABLE emp;
FLASHBACK TABLE emp TO BEFORE DROP;
INSERT INTO emp VALUES (2.COTT 10); INSERT INTO emp VALUES (3,ING 55);

A. Both the INSERT statements would succeed because none of the constraints on the table are automatically retrieved when the table is flashed back.
B. Both the INSERT statements would fail because all constraints are automatically retrieved when the table is flashed back.
C. Only the first INSERT statement would succeed because all the constraints except the primary key constraint are automatically retrieved after a table is flashed back.
D. Only the second INSERT statement would succeed because all the constraints except referential integrity constraints that reference other tables are retrieved automatically after the table is flashed back.
正解：D