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Topics of Oracle 1Z0-071: Oracle Database SQL Exam
The Oracle 1Z0-071 dumps tests the abilities and knowledge of the candidates by checking the following objectives:
Relational Database concepts
- Explaining the relationship between a database and SQL
- Relating clauses in SQL Select Statement to Components of an ERD
- Explaining the theoretical and physical aspects of a relational database
Retrieving Data using the SQL SELECT Statement
- Using Column aliases
- Using The SQL SELECT statement
- Using Arithmetic expressions and NULL values in the SELECT statement
- Using concatenation operator, literal character strings, alternative quote operator, and the DISTINCT keyword
Restricting and Sorting Data
- Applying Rules of precedence for operators in an expression
- Using the DEFINE and VERIFY commands
- Using Substitution Variables
- Sorting Data
- Limiting Rows Returned in a SQL Statement
Using Single-Row Functions to Customize Output
- Performing arithmetic with date data
- Manipulating strings with character functions in SQL SELECT and WHERE clauses
- Manipulating dates with the date function
- Manipulating numbers with the ROUND, TRUNC and MOD functions
Using Conversion Functions and Conditional Expressions
- Nesting multiple functions
- Understanding implicit and explicit data type conversion
- Applying the NVL, NULLIF, and COALESCE functions to data
- Using the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions
Reporting Aggregated Data Using Group Functions
- Creating Groups of Data
- Restricting Group Results
- Using Group Functions
Displaying Data from Multiple Tables
- Use of non-equijoins
- Understanding and Using Cartesian Products
- Using OUTER joins
- Using Various Types of Joins
- Using Self-joins
Using Subqueries to Solve Queries
- Using Single Row Subqueries
- Update and delete rows using correlated subqueries
- Using Multiple Row Subqueries
Using SET Operators
- Using The INTERSECT operator
- Matching the SELECT statements
- Using The MINUS operator
- Using The UNION and UNION ALL operators
- Using the ORDER BY clause in set operations
Managing Tables using DML statements
- Perform Insert, Update and Delete operations
- Managing Database Transactions
- Controlling transactions
- Performing multi table Inserts
- Performing Merge statements
Managing Indexes Synonyms and Sequences
- Managing Sequences
- Managing Synonyms
- Managing Indexes
Use DDL to manage tables and their relationships
- Managing Constraints
- Creating and using external tables
- Creating and using Temporary Tables
- Truncating tables
- Creating tables
- Describing and Working with Columns and Data Types
- Describing and Working with Tables
- Dropping columns and setting columns UNUSED
Managing Views
- Managing Views
- Controlling User Access
- Distinguishing between granting privileges and roles
- Differentiating system privileges from object privileges
- Granting privileges on tables
Managing Objects with Data Dictionary Views
- Working with CURRENT_DATE, CURRENT_TIMESTAMP,and LOCALTIMESTAMP
- Working with INTERVAL data types
- Using data dictionary views
- Managing Data in Different Time Zones
NEW QUESTION 70
View the Exhibit and examine the structure of CUSTOMERStable.
Using the CUSTOMERStable, you need to generate a report that shows an increase in the credit limit by
15% for all customers. Customers whose credit limit has not been entered should have the message "Not Available" displayed.
Which SQL statement would produce the required result?
- A. SELECT TO_CHAR (NVL(cust_credit_limit * .15), 'Not Available') "NEW CREDIT" FROM customers;
- B. SELECT NVL(cust_credit_limit), 'Not Available') "NEW CREDIT"
FROM customers; - C. SELECT NVL(cust_credit_limit * .15), 'Not Available') "NEW CREDIT"
FROM customers; - D. SELECT NVL (TO CHAR(cust_credit_limit * .15), 'Not Available') "NEW CREDIT" FROM customers;
Answer: D
NEW QUESTION 71
Which two statements are true about a full outer join? (Choose two.)
- A. It includes rows that are returned by an inner join.
- B. The Oracle join operator (+) must be used on both sides of the join condition in the WHEREclause.
- C. It returns matched and unmatched rows from both tables being joined.
- D. It returns only unmatched rows from both tables being joined.
- E. It includes rows that are returned by a Cartesian product.
Answer: A,C
Explanation:
Explanation/Reference: https://www.w3resource.com/oracle/joins/oracle-full-outer-join.php
NEW QUESTION 72
Which two statements are true about the rules of precedence for operators? (Choose two.)
- A. The + binary operator has the highest precedence in an expression in a SQL statement
- B. The concatenation operator | | is always evaluated before addition and subtraction in an expression
- C. Arithmetic operators with equal precedence area evaluated from left to right within an expression
- D. Multiple parentheses can be used to override the default precedence of operators in an expression
- E. NULLS influence the precedence of operators in an expression
Answer: A,D
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14200/operators001.htm
NEW QUESTION 73
Which three statements are true about sequences in a single instance Oracle database? (Choose three.)
- A. A sequence's unallocated cached value are lost if the instance shuts down
- B. A sequence number that was allocated can be rolled back if a transaction fails
- C. Sequences can always have gaps
- D. A sequence can only be dropped by a DBA
- E. Two or more tables cannot have keys generated from the same sequence
- F. A sequence can issue duplicate values
Answer: A,B,C
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_6015.htm
NEW QUESTION 74
Examine this statement which executes successfully:
Which statement will violate the CHECK constraint?
- A. UPDATE emp80
SET department_id=90
WHERE department_id=80; - B. SELECT *
FROM emp80
WHERE department_id=90; - C. SELECT *
FROM emp80
WHERE department_id=80; - D. DELETE FROM emp80
WHERE department_id=90;
Answer: A
NEW QUESTION 75
Examine the structure of the EMPLOYEES table.
There is a parent-child relationship between EMPLOYEE_ID and MANAGER_ID.
You want to display the last names and manager IDs of employees who work for the same manager as the employee whose EMPLOYEE_ID is 123.
Which query provides the correct output?
- A. SELECT e.last_name, e.manager_idFROM employees e RIGHT OUTER JOIN employees mon (e.employee_id = m.employee_id)WHERE e.employee_id = 123;
- B. SELECT e.last_name, m.manager_idFROM employees e RIGHT OUTER JOIN employees mon (e.manager_id = m.employee_id)AND e.employee_id = 123;
- C. SELECT e.last_name, m.manager_idFROM employees e LEFT OUTER JOIN employees mon (e.employee_id = m.manager_id)WHERE e.employee_id = 123;
- D. SELECT m.last_name, e.manager_idFROM employees e LEFT OUTER JOIN employees mon (e.manager_id = m.manager_id)WHERE e.employee_id = 123;
Answer: D
NEW QUESTION 76
View the Exhibit and examine the structure of ORDERS and ORDER_ITEMS tables.
ORDER_ID is the primary key in the ORDERS table. It is also the foreign key in the ORDER_ITEMS table wherein it is created with the ON DELETE CASCADE option.
Which DELETE statement would execute successfully?
- A. DELETEFROM ordersWHERE (SELECT order_idFROM order_items);
- B. DELETE ordersWHERE order_total < 1000;
- C. DELETE order_idFROM ordersWHERE order_total < 1000;
- D. DELETE orders o, order_items IWHERE o.order_id = i.order_id;
Answer: A
NEW QUESTION 77
View the Exhibit and examine the structure in the EMPLOYEES tables.
Evaluate the following SQL statement:
SELECT employee_id, department_id
FROM employees
WHERE department_id= 50 ORDER BY department_id
UNION
SELECT employee_id, department_id
FROM employees
WHERE department_id= 90
UNION
SELECT employee_id, department_id
FROM employees
WHERE department_id= 10;
What would be the outcome of the above SQL statement?
- A. The statement would not execute because the ORDER BY clause should appear only at the end of the SQL statement, that is, in the last SELECT statement.
- B. The statement would execute successfully but it will ignore the ORDER BY clause and display the rows in random order.
- C. The statement would execute successfully and display all the rows in the ascending order of DEPARTMENT_ID.
- D. The statement would not execute because the positional notation instead of the column name should be used with the ORDER BY clause.
Answer: A
NEW QUESTION 78
Which three statements are true about performing DML operations on a view with no Instead of triggers defined?
- A. Insert statements can always be done on a table through a view.
- B. Views cannot be used to query rows from an underlying table if the table has a PRIMARY KEY and the PRIMARY KEY columns are not referenced in the defining query of the view.
- C. Delete statements can always be done on a table tough a view.
- D. Views cannot be used to add rows to an underlying table if the table has columns with NOT NULL constraints lacking default values which are not referenced in the defining query of the view.
- E. Views cannot be used to add or modify rows in an underlying table if the defining query of the view contains the DISTINCT keyword.
- F. WITH CHECK clause has no effect when deleting rows from the underlying table through the view.
Answer: B,D,E
NEW QUESTION 79
View the Exhibit and examine the data in ORDERS and ORDER_ITEMS tables.
You need to create a view that displays the ORDER ID, ORDER_DATE, and the total number of items in each order.
Which CREATE VIEW statement would create the view successfully?
- A. CREATE OR REPLACE VIEW ord_vu
AS SELECT o.order_id, o.order_date, COUNT(i.line_item_id)
"NO OF ITEMS"
FROM orders o JOIN order_items i
ON (o.order_id = i.order_id)
GROUP BY o.order_id,o.order_date; - B. CREATE OR REPLACE VIEW ord_vu
AS SELECT o.order_id, o.order_date, COUNT(i.line_item_id)ll' NO OF ITEMS'
FROM orders o JOIN order_items i
ON (o.order_id = i.order_id)
GROUP BY o.order_id,o.order_date
WITH CHECK OPTION; - C. CREATE OR REPLACE VIEW ord_vu (order_id,order_date)
AS SELECT o.order_id, o.order_date, COUNT(i.line_item_id)
"NO OF ITEMS"
FROM orders o JOIN order_items i
ON (o.order_id = i.order_id)
GROUP BY o.order_id,o.order_date; - D. CREATE OR REPLACE VIEW ord_vu
AS SELECT o.order_id, o.order_date, COUNT(i.line_item_id)
FROM orders o JOIN order_items i ON (o.order_id = i.order_id)
GROUP BY o.order_id,o.order_date;
Answer: A
NEW QUESTION 80
n the customers table, the CUST_CITY column contains the value 'Paris' for the CUST_FIRST_NAME 'Abigail'.
Evaluate the following query:
What would be the outcome?
- A. Abigail Pa
- B. Abigail PA
- C. Abigail IS
- D. An error message
Answer: A
NEW QUESTION 81
Which three statements are true about multiple row subqueries? (Choose three.)
- A. They can contain HAVINGclauses.
- B. They can contain GROUP BY clauses.
- C. Two or more values are always returned from the subquery.
- D. They can return multiple columns.
- E. They cannot contain a subquery.
Answer: B,C,D
Explanation:
Explanation/Reference: https://www.w3resource.com/sql/subqueries/multiplee-row-column-subqueries.php
NEW QUESTION 82
View the Exhibit and examine the structure of the SALES and PRODUCTS tables. (Choose two.)
In the SALES table, PROD_ID is the foreign key referencing PROD_ID in the PRODUCTS table. You must list each product ID and the number of times it has been sold.
Examine this query which is missing a JOIN operator:
Which two JOIN operations can be used to obtain the required output? (Choose two.)
- A. LEFT OUTER JOIN
- B. JOIN
- C. FULL OUTER JOIN
- D. RIGHT OUTER JOIN
Answer: A,C
NEW QUESTION 83
Which three statements are true about defining relations between tables in a relational database?
- A. Every primary or unique key value must refer to a matching foreign key value.
- B. Every foreign key value must refer to a matching primary or unique key value.
- C. Foreign key columns allow null values.
- D. Unique key columns allow null values.
- E. Primary key columns allow null values.
Answer: B,E
NEW QUESTION 84
Examine this SELECT statement and view the Exhibit to see its output:
SELECT constraints_name, constraints_type, search_condition, r_constraint_name, delete_rule, status, FROM user_constraints WHERE table_name = 'ORDERS'; Which two statements are true about the output? (Choose two.)
- A. The DELETE_RULE column indicates the desired state of related rows in the child table when the corresponding row is deleted from the parent table.
- B. The STATUS column indicates whether the table is currently in use.
- C. In the second column, 'c' indicates a check constraint.
- D. The R_CONSTRAINT_NAME column contains an alternative name for the constraint.
Answer: A,C
NEW QUESTION 85
Which two statements are true about transactions in the Oracle Database server?
- A. A user can always see uncommitted updates made by the same user in a different session.
- B. A Data Definition Language (DDL) statement does a COMMIT automatically only for the data dictionary updates caused by the DDL.
- C. A session can always see uncommitted updates made by itself.
- D. Data Manipulation Language (DML) statements always start a new transaction.
- E. If a session has an uncommitted transaction, then a DDL statement issues a COMMIT before starting a new transaction.
- F. An uncommitted transaction commits automatically if the user exists SQL*Plus.
Answer: C,D
NEW QUESTION 86
Which two statements are true regarding operators used with subqueries (Choose two.)
- A. The NOT INoperator is equivalent to IS NULL.
- B. =ANYand =ALLoperators have the same functionality.
- C. The INoperator cannot be used in single-row subqueries.
- D. The NOToperator can be used with IN, ANYand ALLoperators.
- E. The <ANYoperator means less than the maximum.
Answer: D,E
NEW QUESTION 87
Which two statements execute successfully?
- A. SELECT TO _ CHAR ('2019-DEC-25 15:30'.'YYYY-MON-DD HH24:MI')
FROM DUAL - B. SELECT TO_CHAR('2019-DEC-25 15:30", YY-MON-D HH24:M2', 'NLS_DATE LANGUAGE =
AMERICAN')
FROM DUAL; - C. SELECT TO _ CHAR (TO_ DATE ('2019-DEC-25 03:30','YYYY-MON-DD HH12:MI'))
FROM DUAL - D. SELECT TO _DATE (TO_ CHAR ('2019-DEC-25 03:30', 'YYYY-MON-DD HH12:MI'))
FROM DUAL; - E. SELECT TO_ DATE('2019-DEC-25 15:30', 'YYYY-MON-DD HH24:MI', 'NLS_ DATE_ LANGUAGE
=AMERICAN' ) FROM DUAL;
Answer: C,E
NEW QUESTION 88
The customers table has the following structure:
You need to write a query that does the following tasks:
1. Display the first name and tax amount of the customers. Tax is 5% of their credit limit.
2. Only those customers whose income level has a value should be considered.
3. Customers whose tax amount is null should not be considered.
Which statement accomplishes all the required tasks?
- A. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level IS NOT NULL ANDtax_amount IS NOT NULL;
- B. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level <> NULL ANDtax_amount <> NULL;
- C. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level IS NOT NULL ANDcust_credit_limit IS NOT NULL;
- D. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE (cust_income_level, tax_amount) IS NOT NULL;
Answer: C
NEW QUESTION 89
Which two statements are true? (Choose two.)
- A. The USER_SYNONYMS view can provide information about private synonyms.
- B. The user SYSTEM owns all the base tables and user-accessible views of the data dictionary.
- C. The USER_OBJECTS view can provide information about the tables and views created by the user who queries the view.
- D. DICTIONARY is a view that contains the names of all the data dictionary views that the user can access.
- E. All the dynamic performance views prefixed with v$ are accessible to all the database users.
Answer: A,C
NEW QUESTION 90
Which statement is true about SQL query processing in an Oracle database instance? (Choose the best answer.)
- A. During row source generation, rows that satisfy the query are retrieved from the database and stored in memory.
- B. During executing, the oracle server may read data from storage if the required data is not already in memory.
- C. During parsing, a SQL statement containing literals in the WHERE clause that has been executed by any session and which is cached in memory, is always reused for the current execution.
- D. During optimization, execution plans are formulated based on the statistics gathered by the database instance, and the lowest cost plan is selected for execution.
Answer: B
NEW QUESTION 91
You execute this command:
ALTER TABLE employees SET UNUSED(department_id)
Which two are true? (Choose two.)
- A. A query can be display data from the DEPARTMENT_IDcolumn.
- B. The storage space occupied by the DEPARTMENT_IDcolumn is released only after a COMMITis issued.
- C. The DEPARTMENT_IDcolumn is set to null for all rows in the table.
- D. No updates can be made to the data in the DEPARTMENT_IDcolumn.
- E. The DEPARTMENT_IDcolumn can be recovered from the recycle bin.
- F. A new column with the name DEPARTMENT_IDcan be added to the EMPLOYEEStable.
Answer: C,F
Explanation:
If a new column is added to a table, the column is initially NULL
Reference:
https://docs.oracle.com/cd/B28359_01/server.111/b28310/tables006.htm#ADMIN11005
NEW QUESTION 92
......
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