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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Table structure, columns, data types - Views management - Temporary and external tables - CREATE TABLE statement - Drop columns, set unused columns - Constraints management |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Using Functions | 25% | - Character functions for string manipulation - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Nested functions |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results - Operator precedence rules - Using SELECT statement and column aliases - Limiting rows and substitution variables - Arithmetic expressions and NULL values |
Oracle Database 23ai SQL Associate Sample Questions:
1. What happens when the TRUNCATE TABLE statement is executed?
A) Deletes all rows in the table and logs the operation for rollback
B) Deletes all rows in the table without logging the operation for rollback
C) Deletes only the last row in the table
D) Deletes the table structure permanently
2. 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;
A) Returns only the employees with salaries and bonuses
B) Returns only employees with duplicate employee IDs in both tables
C) Combines all employee IDs, salaries, and bonuses, including duplicates
D) Combines the salaries and bonuses for employees, removing duplicates
3. What is a subquery in SQL?
A) A query used to create a table
B) A query that combines data from multiple tables
C) A query used for joining two or more tables
D) A query inside another query
4. What is the primary purpose of an index in SQL?
A) To enforce data integrity constraints
B) To improve the performance of data retrieval queries
C) To ensure uniqueness of values in a column
D) To store metadata about a table
5. In a relational database, what is a foreign key?
A) A unique identifier for a record in a table
B) A key used to sort data in a specific order
C) A key that is used to establish a relationship between two tables
D) A temporary key generated during query execution
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: C | Question # 3 Answer: D | Question # 4 Answer: B | Question # 5 Answer: C |
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