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Oracle 1Z0-047

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Questions and Answers : 278
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    Oracle 1Z0-047 (Oracle Database SQL Expert)

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1Z0-047 Questions and Answers

1Z0-047

QUESTION: 270

View the Exhibit and examine the structure for the ORDERS and ORDER_ITEMS tables. You want to display ORDER_ID, PRODUCT_ID, and TOTAL (UNIT_PRICE multiplied by QUANTITY) for all the orders placed in the last seven days. Which query would you execute?


  1. SELECT order_id, product_id, unit_price*quantity "TOTAL" FROM order_items oi JOIN orders o

    ON (o.order_id=oi.order_id)

    WHERE o.order_date>=SYSDATE-7;

  2. SELECT o.order_id,oi.product_id, oi.unit_price*oi.quantity "TOTAL" FROM order_items oi JOIN orders o

    USING (order_id)

    WHERE o.order_date>=SYSDATE-7;

  3. SELECT o.order_id, oi.product_id, oi.unit_price*oi.quantity "TOTAL" FROM order_items oi JOIN orders o

    WHERE o.order_date>=SYSDATE-7 ON (o.order_id=oi.order_id);

  4. SELECT o.order_id, oi.product_id, oi.unit_price*oi.quantity "TOTAL" FROM order_items oi JOIN orders o

ON (o.order_id=oi.order_id)

WHERE o.order_date>=SYSDATE-7;


Answer: D


QUESTION: 271

Which two statements are true regarding the types of table joins available in Oracle Database 10g? (Choose two.)


  1. You can use the JOIN clause to join only two tables.

  2. You can explicitly provide the join condition with a NATURAL JOIN.

  3. You can use the USING clause to join tables on more than one column.

  4. You can use the ON clause to specify multiple conditions while joining tables.


Answer: C, D


QUESTION: 272

Which two statements are true regarding subqueries? (Choose two.)


  1. The ORDER BY clause can be used in the subquery.

  2. A subquery can be used in the FROM clause of a SELECT statement.

  3. If the subquery returns NULL, the main query may still return result rows.

  4. A subquery can be placed in a WHERE clause, GROUP BY clause, or a HAVING clause.

  5. Logical operators, such as AND, OR and NOT, cannot be used in the WHERE clause of a

subquery.


Answer: A, B


QUESTION: 273

Evaluate the following SQL statements in the given order: DROP TABLE dept;

CREATE TABLE dept

(deptno NUMBER(3) PRIMARY KEY, deptname VARCHAR2(10));

DROP TABLE dept;

FLASHBACK TABLE dept TO BEFORE DROP;

Which statement is true regarding the above FLASHBACK operation?

  1. It recovers only the first DEPT table.

  2. It recovers only the second DEPT table.

  3. It does not recover any of the tables because FLASHBACK is not possible in this case.

  4. It recovers both the tables but the names would be changed to the ones assigned in the RECYCLEBIN.


Answer: B


QUESTION: 274

Given below is a list of functions and their purpose in random order. Function Purpose

1)NVL a) Used for evaluating NOT NULL and NULL values 2)NULLIF b) Used to return the first non- null values in a list of expressions

  1. COALESCE c) Used to compare two expressions. If both are same, it returns NULL; otherwise, it returns only the first expression.

  2. NVL2 d) Used to convert NULL values to actual values Identify the correct combination of functions and their usage.


A. 1-a, 2-c, 3-b, 4-d

B. 1-d, 2-c, 3-b, 4-a

C. 1-b, 2-c, 3-d, 4-a

D. 1-d, 2-b, 3-c, 4-a


Answer: B


QUESTION: 275

Which three statements are true regarding single-row functions? (Choose three.)


  1. They can accept only one argument.

  2. They can be nested up to only two levels.

  3. They can return multiple values of more than one data type.

  4. They can be used in SELECT, WHERE, and ORDER BY clauses.

  5. They can modify the data type of the argument that is referenced.

  6. They can accept a column name, expression, variable name, or a user-supplied constant as

arguments.


Answer: D, E, F


QUESTION: 276

View the Exhibit and examine the description of the ORDERS table. Which two WHERE clause

conditions demonstrate the correct usage of conversion functions? (Choose two.)


  1. WHERE order_date > TO_DATE('JUL 10 2006','MON DD YYYY')

  2. WHERE TO_CHAR(order_date,'MON DD YYYY') = 'JAN 20 2003'

  3. WHERE order_date > TO_CHAR(ADD_MONTHS(SYSDATE,6),'MON DD YYYY')

  4. WHERE order_date IN ( TO_DATE('Oct 21 2003','Mon DD YYYY'), TO_CHAR('NOV 21

2003','Mon DD YYYY') )


Answer: A, B


QUESTION: 277

View the Exhibit and examine the data in the CUST_DET table. You executed the following

multitable INSERT statement:

INSERT FIRST

WHEN credit_limit >= 5000 THEN

INTO cust_1 VALUES(cust_id, credit_limit, grade, gender) WHEN grade = THE

INTO cust_2 VALUES(cust_id, credit_limit, grade, gender) WHEN gender = THE INTO cust_3 VALUES(cust_id, credit_limit, grade, gender)

INTO cust_4 VALUES(cust_id, credit_limit, grade, gender) ELSE

INTO cust_5 VALUES(cust_id, credit_limit, grade, gender) SELECT * FROM cust_det;

The row will be inserted in .


  1. CUST_1 table only because CREDIT_LIMIT condition is satisfied

  2. CUST_1 and CUST_2 tables because CREDIT_LIMIT and GRADE conditions are satisfied

  3. CUST_1,CUST_2 and CUST_5 tables because CREDIT_LIMIT and GRADE conditions are satisfied but GENDER condition is not satisfied

  4. CUST_1, CUST_2 and CUST_4 tables because CREDIT_LIMIT and GRADE conditions are satisfied for CUST_1 and CUST_2, and CUST_4 has no condition on it


Answer: A


QUESTION: 278

Evaluate the following statements:

CREATE TABLE digits

(id NUMBER(2),

description VARCHAR2(15));

INSERT INTO digits VALUES (1,'ONE');

UPDATE digits SET description ='TWO' WHERE id=1; INSERT INTO digits VALUES

(2,'TWO'); COMMIT;

DELETE FROM digits;

SELECT description FROM digits

VERSIONS BETWEEN TIMESTAMP MINVALUE AND MAXVALUE;

What would be the outcome of the above query?


  1. It would not display any values.

  2. It would display the value TWO once.

  3. It would display the value TWO twice.

  4. It would display the values ONE, TWO, and TWO.


Answer: C

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