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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Drop columns, set unused columns - Temporary and external tables - Table structure, columns, data types - Views management - TRUNCATE TABLE statement - Constraints management |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Using Functions | 25% | - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Nested functions - Group functions and grouping data - Data type conversion: implicit and explicit |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - Operator precedence rules - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Sorting query results - Arithmetic expressions and NULL values |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
Oracle Database 23ai SQL Associate Sample Questions:
1. What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;
A) Deletes the employees table
B) Drops the salary column from the employees table
C) Sets the salary column to NULL for all rows
D) Removes duplicate rows from the employees table
2. How can you ensure that data is sorted in descending order in a SQL query?
A) Use the ORDER keyword
B) Use the DESC keyword
C) Use the ASC keyword
D) Use the DISTINCT keyword
3. How can a synonym benefit database design?
A) It improves query execution time.
B) It enforces constraints on table columns.
C) It provides a consistent reference to database objects, even if their underlying names change.
D) It allows the renaming of columns in a table.
4. What does a Cartesian product in SQL result from?
A) A NATURAL JOIN without specifying join conditions
B) An INNER JOIN without specifying join conditions
C) An OUTER JOIN with NULL values
5. What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);
A) Return employees with a salary above the average salary
B) Return employees with a salary equal to the average salary
C) Return employees with a salary below the average salary
D) Return all employees and their salaries
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: B | Question # 3 Answer: C | Question # 4 Answer: B | Question # 5 Answer: A |
