1Z0-071 EXAMCOLLECTION DUMPS TORRENT - EXAM 1Z0-071 QUICK PREP

1z0-071 Examcollection Dumps Torrent - Exam 1z0-071 Quick Prep

1z0-071 Examcollection Dumps Torrent - Exam 1z0-071 Quick Prep

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Oracle 1z0-071 (Oracle Database SQL) Certification Exam is an industry-recognized certification that validates the skills of SQL developers, database administrators, and database designers. 1z0-071 exam is designed to test the candidate's knowledge of SQL language, database concepts, and data modeling. The Oracle 1z0-071 Certification is considered one of the most prestigious certifications in the IT industry, and it is highly recognized by leading IT organizations worldwide.

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Oracle Database SQL Sample Questions (Q25-Q30):

NEW QUESTION # 25
Which three statements are true about time zones, date data types, and timestamp data types in an Oracle database?

  • A. A TIMESTAMP WITH LOCAL TIMEZONE data type column is stored in the database using the time zone of the session that inserted the row.
  • B. A TIMESTAMP data type column contains information about year, month, and day.
  • C. The DBTIMEZONE function can return an offset from Universal Coordinated Time (UTC).
  • D. The CURRENT_TIMESTAMP function returns data without time zone information.
  • E. The SESSIONTIMEZONE function can return an offset from Universal Coordinated Time (UTC).

Answer: C,D,E


NEW QUESTION # 26
Examine the commands used to create DEPARTMENT_DETAILSand COURSE_DETAILS tables:

You want to generate a list of all department IDs that do not exist in the COURSE_DETAILStable.
You execute the SQL statement:

What is the outcome?

  • A. It executes successfully but displays an incorrect list.
  • B. It executes successfully and displays the required list.
  • C. It fails because the ON clause condition is not valid.
  • D. It fails because the join type used is incorrect.

Answer: B

Explanation:
Explanation


NEW QUESTION # 27
Examine the description of the EMPLOYEES table:

Which query is valid?

  • A. SELECT dept_id, MAX (AVG(salary)) FROM employees GROUP BY dept_id;
  • B. SELECT dept_id, AVG(NAX(salary)) FROM employees GROUP BY dept_id;
  • C. SELECT dept_id, join date, SUM(salary) FROM employees GROUP BY dept_id,join_date;
  • D. SELECT dept_id, join_date, SUM(salary) FROM employees GROUP BY dept_id;

Answer: C

Explanation:
When using the GROUP BY clause, every column in the SELECT clause that is not an aggregate function must be included in the GROUP BY clause:
A . SELECT dept_id, join_date, SUM(salary) FROM employees GROUP BY dept_id, join_date: This is a valid query because all non-aggregate columns in the SELECT list (dept_id and join_date) are included in the GROUP BY clause.
Queries B and C are invalid because they attempt to nest aggregate functions, which is not allowed. Query D is invalid because join_date is not included in the GROUP BY clause.
Reference:
Oracle Database SQL Language Reference 12c, specifically the section on GROUP BY clause constraints.


NEW QUESTION # 28
Which two statements are true about Oracle databases and SQL?

  • A. Updates performed by a database user can be rolled back by another user by using the ROLLBACK command.
  • B. A query can access only tables within the same schema.
  • C. When you execute an UPDATE statement, the database instance locks each updated row.
  • D. The database guarantees read consistency at select level on user-created tablers.
  • E. A user can be the owner of multiple schemas In the same database.

Answer: C,D


NEW QUESTION # 29
View the exhibit and examine the description of SALES and PROMOTIONS tables.

You want to delete rows from the SALES table, where the PROMO_NAME column in the PROMOTIONS table has either blowout sale or everyday low price as values.
Which three DELETE statements are valid? (Choose three.)

  • A. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'blowout sale')OR promo_name = 'everyday low price');
  • B. DELETEFROM salesWHERE promo_id IN (SELECT promo_idFROM promotionsWHERE promo_name IN = 'blowout sale','everyday low price'));
  • C. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promo_name = 'blowout sale')AND promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'everyday low price')FROM promotionsWHERE promo_name = 'everyday low price');
  • D. DELETEFROM salesWHERE promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'blowout sale')OR promo_id = (SELECT promo_idFROM promotionsWHERE promo_name = 'everyday low price')

Answer: A,B,D


NEW QUESTION # 30
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