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1Z0-051 PDF DEMO:
QUESTION NO: 1
What is true about sequences?
A. Once created, a sequence belongs to a specific schema.
B. Once created, a sequence is linked to a specific table.
C. Once created, a sequence is automatically available to all users.
D. Only the DBA can control which sequence is used by a certain table.
E. Once created, a sequence is automatically used in all INSERT and UPDATE statements.
Answer: A
QUESTION NO: 2
Using the CUSTOMERS table, you need to generate a report that shows 50% of each credit amount in each income level. The report should NOT show any repeated credit amounts in each income level. Which query would give the required result?
A. SELECT cust_income_level, DISTINCT cust_credit_limit * 0.50 AS "50% Credit Limit"
FROM customers;
B. SELECT DISTINCT cust_income_level, DISTINCT cust_credit_limit * 0.50 AS "50%
Credit Limit"
FROM customers;
C. SELECT DISTINCT cust_income_level ' ' cust_credit_limit * 0.50 AS "50% Credit Limit"
FROM customers;
D. SELECT cust_income_level ' ' cust_credit_limit * 0.50 AS "50% Credit Limit" FROM customers;
Answer: C
Explanation:
Duplicate Rows Unless you indicate otherwise, SQL displays the results of a query without eliminating the duplicate rows. To eliminate duplicate rows in the result, include the DISTINCT keyword in the
SELECT clause immediately after the SELECT keyword. You can specify multiple columns after the
DISTINCT qualifier. The DISTINCT qualifier affects all the selected columns, and the result is every distinct combination of the columns.
QUESTION NO: 3
Examine the structure of the TRANSACTIONS table:
Name Null Type
TRANS_ID NOT NULL NUMBER(3)
CUST_NAME VARCHAR2(30)
TRANS_DATE TIMESTAMP
TRANS_AMT NUMBER(10,2)
You want to display the date, time, and transaction amount of transactions that where done before
12 noon.
The value zero should be displayed for transactions where the transaction amount has not been entered.
Which query gives the required result?
A.SELECT TO_CHAR(trans_date,'dd-mon-yyyy hh24:mi:ss'),
TO_CHAR(trans_amt,'$99999999D99')
FROM transactions
WHERE TO_NUMBER(TO_DATE(trans_date,'hh24')) < 12 AND
COALESCE(trans_amt,NULL)<>NULL;
B.SELECT TO_CHAR(trans_date,'dd-mon-yyyy hh24:mi:ss'),
NVL(TO_CHAR(trans_amt,' $99999999D99'),0)
FROM transactions
WHERE TO_CHAR(trans_date,'hh24') < 12;
C.SELECT TO_CHAR(trans_date,'dd-mon-yyyy hh24:mi:ss'),
COALESCE(TO_NUMBER(trans_amt,' $99999999.99'),0)
FROM transactions
WHERE TO_DATE(trans_date,'hh24') < 12;
D.SELECT TO_DATE (trans_date,'dd-mon-yyyy hh24:mi:ss'),
NVL2(trans_amt,TO_NUMBER(trans_amt,'$99999999.99'), 0)
FROM transactions
WHERE TO_DATE(trans_date,'hh24') < 12;
Answer: B
QUESTION NO: 4
Here is the structure and data of the CUST_TRANS table: Exhibit:
Dates are stored in the default date format dd-mm-rr in the CUST_TRANS table.
Which three SQL statements would execute successfully? (Choose three.)
A. SELECT transdate + '10' FROM cust_trans;
B. SELECT * FROM cust_trans WHERE transdate = '01-01-07';
C. SELECT transamt FROM cust_trans WHERE custno > '11';
D. SELECT * FROM cust_trans WHERE transdate='01-JANUARY-07';
E. SELECT custno + 'A' FROM cust_trans WHERE transamt > 2000;
Answer: A,C,D
QUESTION NO: 5
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 ROLE registrar; GRANT MODIFY ON student_grades TO registrar; GRANT registrar to user1, user2, user3
B. CREATE NEW ROLE registrar; GRANT ALL ON student_grades TO registrar; GRANT registrar to user1, user2, user3
C. CREATE ROLE registrar; GRANT UPDATE ON student_grades TO registrar; GRANT ROLE registrar to user1, user2, user3
D. CREATE ROLE registrar; GRANT UPDATE ON student_grades TO registrar; GRANT registrar to user1, user2, user3;
E. CREATE registrar; GRANT CHANGE ON student_grades TO registrar; GRANT registrar;
Answer: D
Explanation:
this is the correct solution for the answer. GRANT role_name to users;
Incorrect
answer: Athere
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
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Updated: May 27, 2022