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Oracle 1z0-071 Reliable Braindumps Files & New 1z0-071 Exam Simulator

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Oracle Database SQL Sample Questions (Q106-Q111):

NEW QUESTION # 106
Which two statements are true regarding subqueries? (Choose two.)

A. If the subquery returns 0 rows, then the value returned by the subquery expression is NULL.
B. The columns in a subquery must always be qualified with the name or alias of the table used.
C. A subquery in the WHERE clause of a SELECT statement can be nested up to three levels only.
D. Only two subqueries can be placed at one level.
E. A subquery can be used to access data from one or more tables or views.

Answer: A,E

NEW QUESTION # 107
Refer to the exhibit.

Which two queries will result in an error?

A. SELECT LAST_NAME,12 * SALARY AS ANNUAL_SALARY
FROM EMPLOYEES
WHERE ANNUAL_SALARY > 100000
ORDER BY 12 * SALARY ;
B. SELECT FIRST_NAME LAST_NAME FROM EMPLOYEES;
C. SELECT LAST_NAME,12 * SALARY AS ANNUAL_SALARY
FROM EMPLOYEES
WHERE 12 * SALARY > 100000
ORDER BY ANNUAL_SALARY;
D. SELECT FIRST_NAME,LAST_NAME FROM EMPLOYEES;
E. SELECT LAST_NAME,12 * SALARY AS ANNUAL_SALARY
FROM EMPLOYEES
WHERE ANNUAL_SALARY > 100000
ORDER BY ANNUAL_SALARY;
F. SELECT LAST_NAME,12 * SALARY AS ANNUAL_SALARY
FROM EMPLOYEES
WHERE 12 * SALARY > 100000
ORDER BY 12 * SALARY;

Answer: A,B

Explanation:
In Oracle SQL, the following syntactical rules apply:
A . This query will result in an error because there is no comma separating the column names FIRST_NAME and LAST_NAME. The correct syntax should include a comma to separate the column names in the SELECT list.
B . This query is correctly formatted with a comma separating the column names, so it will not result in an error.
C . This query will result in an error because an alias defined in the SELECT list (ANNUAL_SALARY) cannot be used in the WHERE clause of the same query level. It must be repeated in the WHERE clause as 12 * SALARY.
D . This query will execute successfully because 12 * SALARY is directly used in the WHERE clause, and ANNUAL_SALARY is used in the ORDER BY clause, which is allowed.
E . This query is correct and will not result in an error. It uses 12 * SALARY in both the WHERE and ORDER BY clauses.
F . Similar to option C, this query will execute successfully because ANNUAL_SALARY is correctly used in the ORDER BY clause, and the WHERE clause does not attempt to reference the alias.
Reference:
Oracle Database SQL Language Reference, 12c Release 1 (12.1): "Database Object Names and Qualifiers"

NEW QUESTION # 108
Which three statements are true regarding the data types? (Choose three.)

A. The value for a CHARdata type column is blank-padded to the maximum defined column width.
B. Only one LONGcolumn can be used per table.
C. A TIMESTAMPdata type column stores only time values with fractional seconds.
D. The BLOBdata type column is used to store binary data in an operating system file.
E. The minimum column width that can be specified for a VARCHAR2data type column is one.

Answer: A,B,E

NEW QUESTION # 109
Examine the structure of the BOOKS_TRANSACTIONStable:

You want to display the member IDs, due date, and late fee as $2 for all transactions.
Which SQL statement must you execute?
SELECT member_id AS MEMBER_ID, due_date AS DUE_DATE, $2 AS LATE_FEE FROM

A. FROM BOOKS_TRANSACTIONS;
B. FROM BOOKS_TRANSACTIONS;
SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", $2 AS "LATE FEE"
C. BOOKS_TRANSACTIONS;
SELECT member_id 'MEMBER ID', due_date 'DUE DATE', '$2 AS LATE FEE' FROM
D. BOOKS_TRANSACTIONS;
SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", '$2' AS "LATE FEE"

Answer: B

NEW QUESTION # 110
Which two statements are true about truncate and delete?

A. the result of a truncate can be undone by issuing a ROLLBACK.
B. the result of a delete can be undone by issuing a rollback
C. delete can use a where clause to determine which row(s) should be removed.
D. truncate leavers any indexes on the table in an UNUSABLE STATE.
E. TRUNCATE can use a where clause to determine which row(s) should be removed.

Answer: B,C

NEW QUESTION # 111
......

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