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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: DDL for Tables and Relationships | 15% | - Temporary and external tables - Constraints management - CREATE TABLE statement - Table structure, columns, data types - Views management - Drop columns, set unused columns - TRUNCATE TABLE statement |
| Topic 2: Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Topic 3: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Topic 4: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Topic 5: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Topic 6: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 7: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 8: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 9: Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Character functions for string manipulation - Group functions and grouping data - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Nested functions - Date arithmetic and date functions - Restricting group results |
| Topic 10: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Sorting query results - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operator precedence rules |
| Topic 11: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
Oracle Database 23ai SQL Associate Sample Questions:
Question 1
What does the NEXTVAL pseudocolumn do in SQL?
A. Resets the sequence to its starting value
B. Deletes the sequence from the database
C. Retrieves the next value in a sequence and increments the sequence
D. Retrieves the current value of a sequence without incrementing it
Question 2
What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;
A. Retrieves all employees, sorted by department ID
B. Retrieves all employees with a salary greater than 5000, sorted by department ID in ascending order
C. Retrieves employees with salary less than 5000, sorted by department ID
D. Retrieves all employees with a salary greater than 5000, sorted by salary in ascending order
Question 3
What is the relationship between SQL and a relational database?
A. SQL is a file system used to store relational database data.
B. SQL is a scripting language used for file manipulation.
C. SQL is used to create flat file databases.
D. SQL is a standard query language used to interact with relational databases
Question 4
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 organizes data hierarchically
C. A database that uses a tabular structure with rows and columns to represent relationships between data entities
D. A flat file system with no defined relationships between data
Question 5
Which SQL function can be used to replace NULL values with a specified value?
A. NVL
B. ISNULL
C. REPLACE
D. COALESCE
Solutions:
| Question 1 Answer: C | Question 2 Answer: B | Question 3 Answer: D | Question 4 Answer: C | Question 5 Answer: A |
