Master the Oracle Database SQL exam with our comprehensive Q&A collection. Review questions by topic, understand explanations, and build confidence for exam day.
Strategies to help you tackle Oracle Database SQL exam questions effectively
Allocate roughly 1-2 minutes per question. Flag difficult questions and return to them later.
Pay attention to keywords like 'MOST', 'LEAST', 'NOT', and 'EXCEPT' in questions.
Use elimination to narrow down choices. Often 1-2 options can be quickly ruled out.
Focus on understanding why answers are correct, not just memorizing facts.
Practice with real exam-style questions for Oracle Database SQL
Option A is correct. The SELECT * statement retrieves all columns from a table, and the WHERE clause filters rows based on the specified condition. Option B is incorrect because ALL is not a valid keyword in this context (SELECT ALL would retrieve all rows, but the syntax is just SELECT). Options C and D are incorrect because GET and RETRIEVE are not valid SQL keywords for querying data.
Option A is correct. The CASE expression evaluates conditions sequentially and returns the corresponding result. When price > 1000, it returns 'Expensive'; when price is between 500 and 1000 (caught by >= 500 after the first condition fails), it returns 'Moderate'; otherwise it returns 'Budget'. Option B is incorrect because IF/ELSIF is not valid SQL syntax (it's PL/SQL procedural syntax). Option C is incorrect because DECODE doesn't accept boolean expressions in this format. Option D is incorrect because SWITCH is not a valid Oracle SQL function.
Option B is correct. The data dictionary is a read-only set of tables and views that is automatically maintained by the Oracle server. Users should never directly modify data dictionary base tables. Option A is incorrect because USER_ views show only objects owned by the current user, not all users. Option C is incorrect because DBA_ views require specific privileges (SELECT_CATALOG_ROLE or DBA role) and are not accessible to all users by default. Option D is incorrect because data dictionary base tables should not be directly modified by users; the Oracle server maintains them automatically through DDL and DML operations.
Option D is correct. Both SELECT DISTINCT and GROUP BY can be used to retrieve unique customer_id values. SELECT DISTINCT customer_id eliminates duplicate rows from the result set. GROUP BY customer_id groups rows with the same customer_id together, effectively producing one row per unique customer_id. Option A is incorrect because UNIQUE is not a valid keyword for eliminating duplicates in Oracle SQL (though it was in older SQL standards). While both B and C work, D is the most complete answer.
Option A is correct. Due to operator precedence, AND is evaluated before OR. The query is interpreted as: (department_id IN (10,20,30) AND hire_date > '01-JAN-2020') OR (salary > 10000). This means it returns employees who meet both the department and hire date conditions, OR any employee (regardless of department or hire date) with salary greater than 10000. Option B is incorrect because the OR condition allows employees with high salaries regardless of department. Option C is incorrectly interprets the logic. Option D is incorrect because Oracle accepts the 'DD-MON-YYYY' date format by default.
Review Q&A organized by exam domains to focus your study
25% of exam • 3 questions
What is the primary purpose of Relational Database Concepts and SQL SELECT Statements in Database Administration?
Relational Database Concepts and SQL SELECT Statements serves as a fundamental component in Database Administration, providing essential capabilities for managing, configuring, and optimizing Oracle solutions. Understanding this domain is crucial for the Oracle Database SQL certification.
Which best practice should be followed when implementing Relational Database Concepts and SQL SELECT Statements?
When implementing Relational Database Concepts and SQL SELECT Statements, follow the principle of least privilege, ensure proper documentation, implement monitoring and logging, and regularly review configurations. These practices help maintain security and operational excellence.
How does Relational Database Concepts and SQL SELECT Statements integrate with other Oracle services?
Relational Database Concepts and SQL SELECT Statements integrates seamlessly with other Oracle services through APIs, shared authentication, and native connectors. This integration enables comprehensive solutions that leverage multiple services for optimal results.
20% of exam • 3 questions
What is the primary purpose of Restricting and Sorting Data in Database Administration?
Restricting and Sorting Data serves as a fundamental component in Database Administration, providing essential capabilities for managing, configuring, and optimizing Oracle solutions. Understanding this domain is crucial for the Oracle Database SQL certification.
Which best practice should be followed when implementing Restricting and Sorting Data?
When implementing Restricting and Sorting Data, follow the principle of least privilege, ensure proper documentation, implement monitoring and logging, and regularly review configurations. These practices help maintain security and operational excellence.
How does Restricting and Sorting Data integrate with other Oracle services?
Restricting and Sorting Data integrates seamlessly with other Oracle services through APIs, shared authentication, and native connectors. This integration enables comprehensive solutions that leverage multiple services for optimal results.
20% of exam • 3 questions
What is the primary purpose of Single-Row and Group Functions in Database Administration?
Single-Row and Group Functions serves as a fundamental component in Database Administration, providing essential capabilities for managing, configuring, and optimizing Oracle solutions. Understanding this domain is crucial for the Oracle Database SQL certification.
Which best practice should be followed when implementing Single-Row and Group Functions?
When implementing Single-Row and Group Functions, follow the principle of least privilege, ensure proper documentation, implement monitoring and logging, and regularly review configurations. These practices help maintain security and operational excellence.
How does Single-Row and Group Functions integrate with other Oracle services?
Single-Row and Group Functions integrates seamlessly with other Oracle services through APIs, shared authentication, and native connectors. This integration enables comprehensive solutions that leverage multiple services for optimal results.
20% of exam • 3 questions
What is the primary purpose of Displaying Data from Multiple Tables and Subqueries in Database Administration?
Displaying Data from Multiple Tables and Subqueries serves as a fundamental component in Database Administration, providing essential capabilities for managing, configuring, and optimizing Oracle solutions. Understanding this domain is crucial for the Oracle Database SQL certification.
Which best practice should be followed when implementing Displaying Data from Multiple Tables and Subqueries?
When implementing Displaying Data from Multiple Tables and Subqueries, follow the principle of least privilege, ensure proper documentation, implement monitoring and logging, and regularly review configurations. These practices help maintain security and operational excellence.
How does Displaying Data from Multiple Tables and Subqueries integrate with other Oracle services?
Displaying Data from Multiple Tables and Subqueries integrates seamlessly with other Oracle services through APIs, shared authentication, and native connectors. This integration enables comprehensive solutions that leverage multiple services for optimal results.
15% of exam • 3 questions
What is the primary purpose of DML Statements and DDL Operations in Database Administration?
DML Statements and DDL Operations serves as a fundamental component in Database Administration, providing essential capabilities for managing, configuring, and optimizing Oracle solutions. Understanding this domain is crucial for the Oracle Database SQL certification.
Which best practice should be followed when implementing DML Statements and DDL Operations?
When implementing DML Statements and DDL Operations, follow the principle of least privilege, ensure proper documentation, implement monitoring and logging, and regularly review configurations. These practices help maintain security and operational excellence.
How does DML Statements and DDL Operations integrate with other Oracle services?
DML Statements and DDL Operations integrates seamlessly with other Oracle services through APIs, shared authentication, and native connectors. This integration enables comprehensive solutions that leverage multiple services for optimal results.
After reviewing these questions and answers, challenge yourself with our interactive practice exams. Track your progress and identify areas for improvement.
Common questions about the exam format and questions
The Oracle Database SQL exam typically contains 50-65 questions. The exact number may vary, and not all questions may be scored as some are used for statistical purposes.
The exam includes multiple choice (single answer), multiple response (multiple correct answers), and scenario-based questions. Some questions may include diagrams or code snippets that you need to analyze.
Questions are weighted based on the exam domain weights. Topics with higher percentages have more questions. Focus your study time proportionally on domains with higher weights.
Yes, most certification exams allow you to flag questions for review and return to them before submitting. Use this feature strategically for difficult questions.
Practice questions are designed to match the style, difficulty, and topic coverage of the real exam. While exact questions won't appear, the concepts and question formats will be similar.
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