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2026 Verified 1Z0-171 dumps Q&As on your Oracle Database Exam Questions Certain Success!

1Z0-171 Exam Dumps – 100% Marks In 1Z0-171 Exam!

Oracle 1Z0-171 Exam Syllabus Topics:

Section Objectives
Topic 1: Using Subqueries – Use multiple-row subqueries
– Use single-row subqueries
– Use correlated subqueries
Topic 2: Using Joins – Use equijoins and non-equijoins
– Use self-joins
– Use cross joins
– Use outer joins (LEFT, RIGHT, FULL)
Topic 3: Using DML Statements – Control transactions
– Use the MERGE statement
– Update rows in a table
– Insert rows into a table
– Delete rows from a table
Topic 4: Using DDL Statements – Create and manage views
– Create and manage indexes
– Create and manage sequences
– Create and manage tables
– Create and manage constraints
Topic 5: Controlling User Access – Grant and revoke privileges
– Create and manage roles
– Differentiate system privileges from object privileges
Topic 6: Using SELECT Statements – Use the ORDER BY clause to sort rows
– Use the FETCH clause to limit rows returned
– Use the WHERE clause to restrict rows
– Execute a basic SELECT statement
Topic 7: Using Set Operators – Use UNION, UNION ALL, INTERSECT, and MINUS operators
Topic 8: Using SQL Functions – Use conversion functions
– Use character, number, and date functions in SELECT statements

 

QUESTION 26
Which Oracle SQL function returns the current date and time, including time zone information?

 
 
 
 

QUESTION 27
How does SQL handle NULL values in arithmetic expressions?

 
 
 
 

QUESTION 28
What will the following query return?
SELECT TO_CHAR(SYSDATE, ‘DD-MM-YYYY’) AS formatted_date FROM dual;

 
 
 
 

QUESTION 29
What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;

 
 
 
 

QUESTION 30
What is the primary purpose of a primary key in a relational database?

 
 
 
 

QUESTION 31
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;

 
 
 
 

QUESTION 32
Which type of INSERT statement allows inserting rows into multiple tables using a single SELECT query?

 
 
 
 

QUESTION 33
What is the result of using the following SQL query?
SELECT 100 + NULL AS result;

 
 
 
 

QUESTION 34
What does the following SQL statement do?
CREATE TABLE employees (
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(50),
hire_date DATE NOT NULL
);

 
 
 
 

QUESTION 35
What is a subquery in SQL?

 
 
 
 

QUESTION 36
What does the INTERSECT operator do in SQL?

 
 
 
 

QUESTION 37
How can you ensure that data is sorted in descending order in a SQL query?

 
 
 
 

QUESTION 38
What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;

 
 
 
 

QUESTION 39
What is the relationship between SQL and a relational database?

 
 
 
 

QUESTION 40
Which of the following statements is true about constraints in Oracle Database?

 
 
 
 

QUESTION 41
Which command grants a user the ability to query data from a specific table?

 
 
 
 

QUESTION 42
Which command is used to add a new column to an existing table?

 
 
 
 

QUESTION 43
What will the following SQL query return?
SELECT TRUNC(15.678, 2) AS truncated_value FROM dual;

 
 
 
 

QUESTION 44
Which of the following best describes a relational database?

 
 
 
 

QUESTION 45
How are NULL values treated in relational databases?

 
 
 
 

QUESTION 46
What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;

 
 
 
 

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