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Introduction to Oracle 1Z0-071: Oracle Database SQL Exam
The Oracle Database SQL Management exam evaluates the knowledge and skills of RAC and Grid Infrastructure Database Administrators and System Administrators with at least one year of experience. Candidates should be able to mount, maintain, monitor, tune and restore RAC databases, clusters and Oracle Automated Storage Management (ASM). You should have a clear knowledge of ASM, Clusterware and Oracle RAC database architectures. They should also be able to track and tune the upload, configuration, backup, and retrieval of these components.
For Oracle Data Base Software produced by Oracle Corporation, the Oracle Real Application Cluster (RAC) in data base computing offers clustering software and high availability in Oracle database environments. Oracle Corporate provides RAC in the Business version, provided that the nodes are clustered using Oracle Clusterware. Oracle RAC requires many computers to operate Oracle RDBMS applications concurrently with clustering while accessing a single database.
Oracle Grid Infrastructure is the software Oracle that maintains a storage framework that involves file system control, volume management and restart process automation. You need to set up Oracle grid infrastructure before deploying Oracle Database if you want to use Oracle restart or Oracle Automated Storage Management (ASM) services.
NEW QUESTION 70
Evaluate the following two queries:
SQL> SELECT cust_last_name, cust_city
FROM customers
WHERE cust_credit_limit IN (1000, 2000, 3000);
SQL> SELECT cust_last_name, cust_city
FROM customers
WHERE cust_credit_limit = 1000 or cust_credit_limit = 2000 or
cust_credit_limit = 3000
Which statement is true regarding the above two queries?
- A. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.
- B. There would be no change in performance.
- C. Performance would improve in query 2.
- D. Performance would degrade in query 2.
Answer: B
Explanation:
References:
http://oraclexpert.com/restricting-and-sorting-data/
NEW QUESTION 71
Examine the structure of the BOOKS_TRANSACTIONStable.
You want to update this table such that BOOK_IDis set to 'INVALID'for all rows where no MEMBER_ID has been entered.
Examine this partial SQL statement:
Which condition must be used in the WHEREclause to perform the required update?
- A. MEMBER_ID = "";
- B. MEMBER_ID = NULL;
- C. MEMBER_ID IS NULL;
- D. MEMBER_ID = '';
Answer: C
NEW QUESTION 72
Examine this description of the PRODUCTS table:
You successfully execute this command:
Which two statements execute without errors? (Choose two.)
- A.
- B.
- C.
- D.
Answer: A,D
NEW QUESTION 73
Which statements are correct regarding indexes? (Choose all that apply.)
- A. Indexes should be created on columns that are frequently referenced as part of any expression.
- B. When a table is dropped, the corresponding indexes are automatically dropped.
- C. A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically attempts to creates a unique index.
- D. For each DML operation performed, the corresponding indexes are automatically updated.
Answer: B,C,D
Explanation:
References:
http://viralpatel.net/blogs/understanding-primary-keypk-constraint-in-oracle/
NEW QUESTION 74
View the Exhibit and examine the structure of the ORDERStable. The columns ORDER_MODEand ORDER_TOTALhave the default values 'direct'and 0respectively.
Which two INSERTstatements are valid? (Choose two.)
INSERT INTO orders
- A. VALUES (1,'09-mar-2007', 'online','', 1000);
INSERT INTO orders - B. (order_id,order_date,order_mode,order_total)
VALUES (1,'10-mar-2007','online',1000); - C. VALUES (1,'09-mar-2007', DEFAULT, 101, DEFAULT);
INSERT INTO orders - D. (SELECT order_id,order_date,customer_id
FROM orders)
VALUES (1,'09-mar-2007', 101);
INSERT INTO orders - E. (order_id,order_date,order_mode,
(customer_id,order_total)
VALUES (1,TO_DATE(NULL), 'online', 101, NULL);
INSERT INTO
Answer: C,D
NEW QUESTION 75
Examine these statements:
CREATE TABLE alter_test (c1 VARCHAR2 (10) , c2 NUMBER (10);
INSERT INTO alter-test VALUES ('123', 123);
Which is true about modifying the columns in Alter_TEST?
Which is true about modifying the columns in ALTER_TEST?
- A. c1 can be changed to number (10) and c2 can he changed to vahchar2 (10) .
- B. c2 can be changed to number (10) but c2 cannot be changed to varchab2 (10) .
- C. c2 can be changed to number (5) but ci cannot be changed to varchar2 (5) .
- D. c1 can be changed to varchar2 (5) and c2 can be changed to number (13, 2) .
- E. c2 can be changed to varchar2 (10) but el cannot be changed to number (10).
Answer: D
NEW QUESTION 76
View the Exhibit and examine the structure of the ORDER_ITEMS table.
You must select the ORDER_ID of the order that has the highest total value among all the orders in the ORDER_ITEMS table.
Which query would produce the desired result?
- A. SELECT order_id
FROM order_items
WHERE (unit_price*quantity) = (SELECT MAX(unit_price*quantity)
FROM order_items
GROUP BY order_id) - B. SELECT order_id
FROM order_items
WHERE(unit_price*quantity) = (SELECT MAX(unit_price*quantity)
FROM order_items)
GROUP BY order_id; - C. SELECT order_id
FROM order_items
WHERE(unit_price*quantity) = MAX(unit_price*quantity)
GROUP BY order_id; - D. SELECT order_id
FROM order_items
GROUP BY order_id
HAVING SUM(unit_price*quantity) = (SELECT MAX(SUM(unit_price*quantity)) FROM order_items GROUP BY order_id);
Answer: D
NEW QUESTION 77
View the Exhibit and examine, the description for the SALES and CHANNELS tables.
(Choose the best answer.)
You issued this SQL statement:
INSERT INTO SALES VALUES (23, 2300, SYSDATE,
(SELECT CAHNNEL_ID
FROM CHANNELS
WHERE CHANNEL_DESC='DIRECT SALES'), 12, 1, 500);
Which statement is true regarding the result?
- A. The statement will fail because the VALUES clause is not required with the subquery.
- B. The statement will execute and a new row will be inserted in the SALES table.
- C. The statement will fail because the sub-query in the VALUES clause is not enclosed within single quotation marks.
- D. The statement will fail because a subquery cannot be used in a VALUES clause.
Answer: B
NEW QUESTION 78
Examine the business rule:
Each student can work on multiple projects and each project can have multiple students.
You need to design an Entity Relationship Model (ERD) for optimal data storage and allow for generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK
Which two statements are true in this scenario? (Choose two.)
- A. STUDENT_ID must be the primary key in the STUDENTS entity and foreign key in the PROJECTS entity.
- B. The ERD must have a M:M relationship between the STUDENTS and PROJECTS entities that must be resolved into 1:M relationships.
- C. PROJECT_ID must be the primary key in the PROJECTS entity and foreign key in the STUDENTS entity.
- D. An associative table must be created with a composite key of STUDENT_ID and PROJECT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities.
- E. The ERD must have a 1:M relationship between the STUDENTS and PROJECTS entities.
Answer: B,D
Explanation:
Explanation
References:
http://www.oracle.com/technetwork/issue-archive/2011/11-nov/o61sql-512018.html
NEW QUESTION 79
In which normal form is a table, if it has no multi-valued attributes and no partial dependencies?
- A. fourth normal form
- B. second normal form
- C. third normal form
- D. first normal form
Answer: B
Explanation:
Explanation
https://blog.udemy.com/database-normal-forms/
NEW QUESTION 80
View the Exhibit and examine the structure of the ORDERS table.
Which UPDATE statement is valid?
- A. UPDATE ordersSET order_date = '12-mar-2007',AND order_total = TO_NUMBER(NULL)WHERE order_id = 2455;
- B. UPDATE ordersSET order_date = TO_DATE('12-mar-2007','dd-mon-yyyy'),SET order_total = TO_NUMBER (NULL)WHERE order_id = 2455;
- C. UPDATE ordersSET order_date = '12-mar-2007',order_total IS NULLWHERE order_id = 2455;
- D. UPDATE ordersSET order_date = '12-mar-2007',order_total = NULLWHERE order_id = 2455;
Answer: D
NEW QUESTION 81
View the exhibit and examine the structure of the CUSTOMERS table.
Which two tasks would require subqueries or joins to be executed in a single statement?
- A. listing of those customers, whose credit limit is the same as the credit limit of customers residing in the city 'Tokyo'.
- B. listing of customers who do not have a credit limit and were born before 1980
- C. finding the average credit limit of male customers residing in 'Tokyo' or 'Sydney'
- D. finding the number of customers, in each city, who's marital status is 'married'.
- E. finding the number of customers, in each city, whose credit limit is more than the average credit limit of all the customers
Answer: A,E
NEW QUESTION 82
The SYSDATEfunction displays the current Oracle Server date as:
21-MAY-19
You wish to display the date as:
MONDAY, 21 MAY, 2019
Which statement will do this?
SELECT TO_DATE(SYSDATE, 'FMDAY, DD MONTH, YYYY') FROM DUAL;
- A. SELECT TO_CHAR(SYSDATE, 'FMDD, DAY MONTH, YYYY') FROM DUAL;
- B. SELECT TO_CHAR(SYSDATE, 'FMDAY, DDTH MONTH, YYYY') FROM DUAL;
- C. SELECT TO_CHAR(SYSDATE, 'FMDAY, DD MONTH, YYYY') FROM DUAL;
- D.
Answer: D
Explanation:
SELECT ID, TO_CHAR(Start_Date,'fmDay Month fmDD, YYYY') AS "Start Date" FROM Employee; Reference: http://www.java2s.com/Code/Oracle/Data-Type/ TOCHARDatefmDayMonthfmDDYYYYEmbeddedspacescanberemovedbyplacingthefmprefix.htm
NEW QUESTION 83
View the exhibit and examine the descriptions of the DEPTand LOCATIONStables.
You want to update the CITYcolumn of the DEPTtable for all the rows with the corresponding value in the CITYcolumn of the LOCATIONStable for each department.
Which SQL statement would you execute to accomplish the task?
- A. UPDATE dept d
SET city = (SELECT city
FROM locations l
WHERE d.location_id = l.location_id); - B. UPDATE dept d
SET city = ALL (SELECT city
FROM locations l
WHERE d.location_id = l.location_id); - C. UPDATE dept d
SET city = (SELECT city
FROM locations l)
WHERE d.location_id = l.location_id; - D. UPDATE dept d
SET city = ANY (SELECT city
FROM locations l)
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION 84
Examine the commands used to create DEPARTMENT_DETAILS and
COURSE_DETAILS tables:
You want to generate a list of all department IDs that do not exist in the COURSE_DETAILS table.
You execute the SQL statement:
What is the outcome?
- A. It fails because the join type used is incorrect.
- B. It executes successfully but displays an incorrect list.
- C. It executes successfully and displays the required list.
- D. It fails because the ON clause condition is not valid.
Answer: C
NEW QUESTION 85
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