PASS GUARANTEED 1Z0-071 - ORACLE DATABASE SQL PERFECT KNOWLEDGE POINTS

Pass Guaranteed 1z0-071 - Oracle Database SQL Perfect Knowledge Points

Pass Guaranteed 1z0-071 - Oracle Database SQL Perfect Knowledge Points

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1z1-071 certification exam is designed to validate the skills and knowledge of professionals working with Oracle Database technology. It is a crucial exam for individuals who want to prove their proficiency in SQL language and database management system. 1z0-071 Exam is designed to test the candidate's knowledge of using SQL to manage and manipulate data in the Oracle database.

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Oracle 1z0-071 exam covers a wide range of topics related to SQL and Oracle databases, including SQL queries, data manipulation, data control language (DCL) and data definition language (DDL) statements, table creation and management, and database security. It also covers advanced SQL concepts such as subqueries, set operators, and data aggregation functions. 1z0-071 Exam consists of 73 multiple-choice questions that must be answered within 100 minutes, and requires a score of at least 63% to pass.

Oracle Database SQL Sample Questions (Q115-Q120):

NEW QUESTION # 115
Which three statements are true about Data Manipulation Language (DML)?

  • A. UPDATE statements can have different subqueries to specify the values for each updated column.
  • B. INSERT statements can insert NULLS explicitly into a column.
  • C. DML statements require a primary key be defined on a table.
  • D. DELETE statements can remove multiple rows based on multiple conditions.
  • E. INSERT INTO...SELECT...FROM statements automatically commit.

Answer: A,B,D


NEW QUESTION # 116
Which three statements are correct regarding indexes? (Choose three.)

  • A. A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically attempts to create a unique index.
  • B. For each DML operation performed on a table, the corresponding indexes are automatically updated if required.
  • C. Indexes should be created on columns that are frequently referenced as part of any expression.
  • D. When a table is dropped, corresponding indexes are automatically dropped.

Answer: A,B,D

Explanation:
References:
http://viralpatel.net/blogs/understanding-primary-keypk-constraint-in-oracle/


NEW QUESTION # 117
The first DROPoperation is performed on PRODUCTStable using the following command:
DROP TABLE products PURGE;
Then you performed the FLASHBACKoperation by using the following command:
FLASHBACK TABLE products TO BEFORE DROP;
Which statement describes the outcome of the FLASHBACKcommand?

  • A. It recovers the table structure, data, and the indexes.
  • B. It recovers only the table structure.
  • C. It recovers the table structure and data but not the related indexes.
  • D. It is not possible to recover the table structure, data, or the related indexes.

Answer: D

Explanation:
Explanation/Reference:
References:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_9003.htm


NEW QUESTION # 118
You need to calculate the number of days from 1st January 2019 until today. Dates are stored in the default format of DD-MON-RR. Which two queries give the required output?

  • A. SELECT SYSDATE - TO_DATE('01-JANUARY-2019*) FROM DUAL;
  • B. SELECT TO_CHAR(SYSDATE, *DD-MON-YYYY*) - '01-JAN-2019' FROM DUAL;
  • C. SELECT ROUND(SYSDATE - TO_DATE('01/JANUARY/2019')) FROM DUAL;
  • D. SELECT ROUND(SYSDATE - '01-JAN-2019') FROM DUAL;
  • E. SELECT TO_DATE(SYSDATE, 'DD/MONTH/YYYY") - '01/JANUARY/2019" FROM DUAL;

Answer: A,C


NEW QUESTION # 119
Which two statements are true about the DUAL table?

  • A. It can be used to display only constants or pseudo columns.
  • B. It can display multiple rows and columns.
  • C. It can be accessed by any user who has the SELECT privilege in any schema
  • D. It can display multiple rows but only a single column.
  • E. It can be accessed only by the SYS user.
  • F. It consists of a single row and single column of VARCHAR2 data type.

Answer: C,F

Explanation:
A). Incorrect. DUAL consists of a single row and column. B. Incorrect. DUAL is a special one-row, one-column table present by default in all Oracle database installations and can be accessed by any user with SELECT privilege. C. Correct. Any user with the SELECT privilege can select from the DUAL table. It is a dummy table used primarily for selecting a constant, pseudocolumn, or expression not involving any tables. D.
Incorrect. DUAL has only one row and one column. E. Correct. The DUAL table has a single VARCHAR2 column called DUMMY, which has a value of 'X'. F. Incorrect. DUAL can be used for a variety of purposes, such as selecting system constants, user environment variables, expressions, and sequences.
This information is detailed in the Oracle Database SQL Language Reference, which describes the properties and uses of the DUAL table.


NEW QUESTION # 120
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