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Question 1:

Which two are the minimal requirements for a self-join? (Choose two.)

A. Only equijoin conditions may be used in the query.

B. Outer joins must not be used in the query.

C. There must be a condition on which the self-join is performed.

D. No other condition except the self-join may be specified.

E. The table used for the self-join must have two different alias names in the query.

Correct Answer: CE

Question 2:

Examine the structure of the BOOKS_TRANSACTIONS table:

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 AS MEMBER_ID, due_date AS DUE_DATE, $2 AS LATE_FEE FROM BOOKS_TRANSACTIONS;

B. SELECT member_id \’MEMBER ID\’, due_date \’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;

Correct Answer: C

Question 3:

Which two statements are true regarding the COUNT function?

A. A SELECT statement using the COUNT function with a DISTINCT keyword cannot have a WHERE clause.

B. COUNT (DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULL values in the INV_AMT column.

C. COUNT (cust_id) returns the number of rows including rows with duplicate customer IDs and NULL value in the CUST_ID column.

D. COUNT (*) returns the number of rows including duplicate rows and rows containing NULL value in any of the columns.

E. The COUNT function can be used only for CHAR, VARCHAR2, and NUMBER data types.

Correct Answer: BD

Question 4:

View the Exhibit and examine the structure of the EMP table which is not partitioned and not an index-organized table. (Choose two.)

Evaluate this SQL statement:

ALTER TABLE emp

DROP COLUMN first_name;

Which two statements are true?

A. The FIRST_NAME column can be dropped even if it is part of a composite PRIMARY KEY provided the CASCADE option is added to the SQL statement.

B. The FIRST_NAME column would be dropped provided at least one column remains in the table.

C. The FIRST_NAME column would be dropped provided it does not contain any data.

D. The drop of the FIRST_NAME column can be rolled back provided the SET UNUSED option is added to the SQL statement.

Correct Answer: B

Question 5:

Examine the structure of the PROGRAMS table:

Which two SQL statements would execute successfully?

A. SELECT NVL (ADD_MONTHS (END_DATE,1) SYSDATE) FROM programs;

B. SELECT TO_DATE (NVL (SYSDATE-END_DATE, SYSDATE)) FROM programs;

C. SELECT NVL (MONTHS_BETWEEN (start_date, end_date), `Ongoing\’) FROM programs;

D. SELECT NVL (TO_CHAR (MONTHS_BETWEEN (start-date, end_date)), `Ongoing\’) FROM programs

Correct Answer: AD

1Z0-071 PDF Dumps 1Z0-071 Exam Questions 1Z0-071 Braindumps

Question 6:

The following are the steps for a correlated subquery, listed in random order:

The WHERE clause of the outer query is evaluated.

The candidate row is fetched from the table specified in the outer query.

This is repeated for the subsequent rows of the table, till all the rows are processed.

Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query. Which is the correct sequence in which the Oracle server evaluates a correlated subquery?

A. 2, 1, 4, 3

B. 4, 1, 2, 3

C. 4, 2, 1, 3

D. 2, 4, 1, 3

Correct Answer: D

http://rajanimohanty.blogspot.co.uk/2014/01/correlated-subquery.html

Question 7:

Examine these SQL statements that are executed in the given order:

CREATE TABLE emp

(emp_no NUMBER (2) CONSTRAINT emp_emp_no_pk PRIMARY KEY,

ename VARCHAR 2 (15),

salary NUMBER (8, 2),

mgr_no NUMBER(2) CONSTRAINT emp_mgr_fk REFERENCES emp (emp_no));

ALTER TABLE emp

DISABLE CONSTRAINT emp_emp_no_pk CASCADE;

ALTER TABLE emp

ENABLE CONSTRAINT emp_emp_no_pk;

What will be the status of the foreign key EMP_MGR_FK?

A. It will be enabled and immediate.

B. It will be enabled and deferred.

C. It will remain disabled and can be re-enabled manually.

D. It will remain disabled and can be enabled only by dropping the foreign key constraint and re-creating it.

Correct Answer: C

Question 8:

You want to display 5 percent of the rows from the SALES table for products with the lowest AMOUNT_SOLD and also want to include the rows that have the same AMOUNT_SOLD even if this causes the output to exceed 5 percent of the rows.

Which query will provide the required result?

A. SELECT prod_id, cust_id, amount_soldFROM salesORDER BY amount_soldFETCH FIRST 5 PERCENT ROWS WITH TIES;

B. SELECT prod_id, cust_id, amount_soldFROM salesORDER BY amount_soldFETCH FIRST 5 PERCENT ROWS ONLY WITH TIES;

C. SELECT prod_id, cust_id, amount_soldFROM salesORDER BY amount_soldFETCH FIRST 5 PERCENT ROWS WITH TIES ONLY;

D. SELECT prod_id, cust_id, amount_soldFROM salesORDER BY amount_soldFETCH FIRST 5 PERCENT ROWS ONLY;

Correct Answer: A

Question 9:

Which statement is true regarding the UNION operator?

A. By default, the output is not sorted.

B. Null values are not ignored during duplicate checking.

C. Names of all columns must be identical across all select statements.

D. The number of columns selected in all select statements need not be the same.

Correct Answer: B

Question 10:

Examine the structure of the MEMBERS table: (Choose the best answer.)

Examine the SQL statement:

SQL > SELECT city, last_name LNAME FROM MEMBERS ORDER BY 1, LNAME DESC;

What would be the result execution?

A. It displays all cities in descending order, within which the last names are further sorted in descending order.

B. It fails because a column alias cannot be used in the ORDER BY clause.

C. It fails because a column number and a column alias cannot be used together in the ORDER BY clause.

D. It displays all cities in ascending order, within which the last names are further sorted in descending order.

Correct Answer: D

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