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Preparation Resources

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Oracle 1z0-071 Exam Syllabus Topics:

Topic	Details
Topic 1	Identify the connection between an ERD and a database using SQL SELECT statements Use the ORDER BY clause to sort SQL query results
Topic 2	Include or exclude grouped rows by using the HAVING clause Describe the types of problems subqueries can solve Update and delete rows using correlated subqueries
Topic 3	Describe the different types of joins and their features Use joins to retrieve data from multiple tables
Topic 4	Using DDL Statements to Create and Manage Tables Describe data types that are available for columns Describe how schema objects work
Topic 5	Using Conversion Functions and Conditional Expressions Use the TOCHAR, TONUMBER, and TO_DATE conversion functions
Topic 6	Create and maintain indexes including invisible indexes and multiple indexes on the same columns Drop co
Topic 7	lumns and set column UNUSED Explain the theoretical and physical aspects of a relational database Use DDL to manage tables and their relationships
Topic 8	Use the EXISTS and NOT EXISTS operators Use single-row and multiple-row subqueries Create simple and complex views with visible invisible columns Create, maintain and use sequences
Topic 9	Apply general functions and conditional expressions in a SELECT statement Displaying Data from Multiple Tables

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Oracle Database SQL Sample Questions (Q38-Q43):

NEW QUESTION # 38
Which three statements are true about the ALTER TABLE....DROP COLUMN.... command? (Choose three.)

• A. A column can be dropped only if it does not contain any data.
• B. A parent key column in the table cannot be dropped.
• C. A dropped column can be rolled back.
• D. The column in a composite PRIMARY KEY with the CASCADE option can be dropped.
• E. A column can be dropped only if another column exists in the table.

Answer: B,D,E
NEW QUESTION # 39
Which two are true about external tables that use the ORACLE_DATAPUMPaccess driver? (Choose two.)

• A. Creating an external table creates a dump file that can be used only by an external table in the same database.
• B. When creating an external table, data can be selected from another external table or from a table whose rows are stored in database blocks.
• C. Creating an external table creates a directory object.
• D. When creating an external table, data can be selected only from a table whose rows are stored in database blocks.
• E. Creating an external table creates a dump file that can be used by an external table in the same or a different database.

Answer: B,C Explanation:
The external tables feature is a complement to existing SQLLoader functionality. It enables you to access data in external sources as if it were in a table in the database.
You must create the directory object before you create the external table.
Reference: https://docs.oracle.com/cd/B1930601/server.102/b14215/etconcepts.htm
https://docs.oracle.com/cd/E1188201/server.112/e22490/etconcepts.htm#SUTIL011
NEW QUESTION # 40*
Which two statements will return the names of the three employees with the lowest salaries?

• A. SELECT last_name,salary
  FROM employees
  ORDER BY salary
  FETCH FIRST 3 ROWS ONLY;
• B. SELECT last_name,salary
  FROM employees
  WHERE ROWNUM<=3
  ORDER BY (SELECT salary FROM employees);
• C. SELECT last_name, salary
  FROM employees
  WHERE ROWNUM<=3
• D. SELECT last_name,salary
  FROM employees
  FETCH FIRST 3 ROWS ONLY
  ORDER BY salary;
• E. SELECT last_name,salary
  FROM (SELECT * FROM employees ORDER BY salary)

Answer: A,E
NEW QUESTION # 41
Examine the structure of the MEMBERStable.
Name Null? Type
- --------------- ----------------- ---------------------------
MEMBERID NOT NULL VARCHAR2 (6)
FIRSTNAME VARCHAR2 (50)
LAST_NAME NOT NULL VARCHAR2 (50)
ADDRESS VARCHAR2 (50)
CITY VARCHAR2 (25)
STATE NOT NULL VARCHAR2 (3)
Which query can be used to display the last names and city names only for members from the states MO and MI?

• A. SELECT last_name, city FROM members WHERE state LIKE 'M%';
• B. SELECT last_name, city FROM members WHERE state IN ('MO', 'MI');
• C. SELECT DISTINCT last_name, city FROM members WHERE state ='MO' OR state
  ='MI';
• D. SELECT last_name, city FROM members WHERE state ='MO' AND state ='MI';

Answer: B
NEW QUESTION # 42
View the Exhibit and examine the structure of the ORDERITEMS table.

You must select the ORDERID of the order that has the highest total value among all the orders in the ORDERITEMS table.
Which query would produce the desired result?
SELECT orderid

• A. FROM orderitems
  GROUP BY orderid
  HAVING SUM(unitprice*quantity) = (SELECT MAX(SUM(unitprice*quantity)) FROM orderitems GROUP BY orderid); SELECT order_id
• B. FROM orderitems
  WHERE (unitpricequantity) = (SELECT MAX(unit_pricequantity)
  FROM orderitems
  GROUP BY orderid)
• C. FROM orderitems
  WHERE(unitpricequantity) = MAX(unit_pricequantity)
  GROUP BY orderid;
  SELECT orderid
• D. FROM orderitems
  WHERE(unitpricequantity) = (SELECT MAX(unit_pricequantity)
  FROM orderitems)
  GROUP BY orderid;
  SELECT order_id

Answer: A
NEW QUESTION # 43
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