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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Operator precedence rules - Arithmetic expressions and NULL values - Sorting query results - Using SELECT statement and column aliases |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| DDL for Tables and Relationships | 15% | - Constraints management - CREATE TABLE statement - Drop columns, set unused columns - Views management - Table structure, columns, data types - TRUNCATE TABLE statement - Temporary and external tables |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Using Functions | 25% | - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Nested functions - Group functions and grouping data - Character functions for string manipulation - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
Oracle Database 23ai SQL Associate Sample Questions:
How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?
- A. LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.
- B. Both functions are identical in output.
- C. LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.
- D. LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
Correct Answer: D 🗳️
Which function is used to extract the year from a date in SQL?
- A. YEAR(date)
- B. EXTRACT(YEAR FROM date)
- C. GET_YEAR(date)
- D. TO_YEAR(date)
Correct Answer: B 🗳️
What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;
- A. EQUI JOIN
- B. NATURAL JOIN
- C. CROSS JOIN
- D. OUTER JOIN
Correct Answer: A 🗳️
What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);
- A. Departments located in location ID 1000
- B. Employees working in location ID 1000
- C. Employees with no department
- D. Employees with salaries greater than 1000
Correct Answer: B 🗳️
Which of the following best describes a relational database?
- A. A database where all data is stored as key-value pairs
- B. A database that uses a tabular structure with rows and columns to represent relationships between data entities
- C. A database that organizes data hierarchically
- D. A flat file system with no defined relationships between data
Correct Answer: B 🗳️
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