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NO.1 Which three statements are true regarding sub queries? (Choose three.)
A. Sub queries can contain GROUP BY and ORDER BY clauses
B. Main query and sub query can get data from different tables
C. Main query and sub query must get data from the same tables
D. Only one column or expression can be compared between the main query and subqeury
E. Multiple columns or expressions can be compared between the main query and sub query
F. Sub queries can contain ORDER BY but not the GROUP BY clause
Answer: A,B,E
1Z0-051会場 1Z0-051知識
NO.2 You are the DBA for an academic database. You need to create a role that allows a group of
users to modify existing rows in the STUDENT_GRADES table.
Which set of statements accomplishes this?
A. CREATE NEW ROLE registrar; GRANT ALL ON student_grades TO registrar; GRANT registrar to
user1, user2, user3
B. CREATE registrar; GRANT CHANGE ON student_grades TO registrar; GRANT registrar;
C. CREATE ROLE registrar; GRANT MODIFY ON student_grades TO registrar; GRANT registrar to user1,
user2, user3
D. CREATE ROLE registrar; GRANT UPDATE ON student_grades TO registrar; GRANT ROLE registrar to
user1, user2, user3
E. CREATE ROLE registrar; GRANT UPDATE ON student_grades TO registrar; GRANT registrar to user1,
user2, user3;
Answer: E
1Z0-051赤本 1Z0-051勉強ガイド
Explanation:
this is the correct solution for the answer. GRANT role_name to users;
Incorrect
answer: Athere
1Z0-051対策書
is no such MODIFY keyword Binvalid CREATE command, there is no such NEW keyword Cinvalid
GRANT command, there is no such ROLE keyword Einvalid GRANT command, there is no such
CHANGE keyword
Refer: Introduction to Oracle9i: SQL, Oracle University Study Guide, 13-10
NO.3 See the Exhibit and examine the structure of ORD table: Exhibit:
Evaluate the following SQL statements that are executed in a user session in the specified order:
CREATE SEQUENCE ord_seq;
SELECT ord_seq.nextval
FROM dual;
INSERT INTO ord
VALUES (ord_seq.CURRVAL, '25-jan-2007,101);
UPDATE ord
SET ord_no= ord_seq.NEXTVAL
WHERE cust_id =101;
What would be the outcome of the above statements?
A. The CREATE SEQUENCE command would not execute because the starting value of the sequence
and the increment value have not been specified.
B. All the statements would execute successfully and the ORD_NO column would contain the value 2
for the CUST_ID 101.
C. All the statements would execute successfully and the ORD_NO column would have the value 20
for the CUST_ID 101 because the default CACHE value is 20.
D. The CREATE SEQUENCE command would not execute because the minimum value and maximum
value for the sequence have not been specified.
Answer: B
1Z0-051科目対策
NO.4 Evaluate the following SQL statement:
SQL> SELECT cust_id, cust_last_name FROM customers WHERE cust_credit_limit IN (select
cust_credit_limit FROM customers WHERE cust_city ='Singapore');
Which statement is true regarding the above query if one of the values generated by the subquery is
NULL?
A. It executes but returns no rows.
B. It produces an error.
C. It ignores the NULL value and generates output for the other values produced by the subquery.
D. It generates output for NULL as well as the other values produced by the subquery.
Answer: D
1Z0-051試験準備 1Z0-051口コミ