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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Using Joins | - Use outer joins (LEFT, RIGHT, FULL) - Use self-joins - Use cross joins - Use equijoins and non-equijoins |
| Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Controlling User Access | - Create and manage roles - Grant and revoke privileges - Differentiate system privileges from object privileges |
| Using SELECT Statements | - Use the FETCH clause to limit rows returned - Use the WHERE clause to restrict rows - Execute a basic SELECT statement - Use the ORDER BY clause to sort rows |
| Using DML Statements | - Insert rows into a table - Delete rows from a table - Use the MERGE statement - Update rows in a table - Control transactions |
| Using DDL Statements | - Create and manage constraints - Create and manage sequences - Create and manage indexes - Create and manage views - Create and manage tables |
| Using Subqueries | - Use correlated subqueries - Use multiple-row subqueries - Use single-row subqueries |
| Using SQL Functions | - Use conversion functions - Use character, number, and date functions in SELECT statements |
Oracle Database 23ai SQL Associate Sample Questions:
1. Which of the following statements creates an ascending sequence starting at 100 and incrementing by 10?
A) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY -10;
B) CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY -100;
C) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY 10;
D) CREATE SEQUENCE seq_1 START WITH 10 INCREMENT BY 100;
2. Which SQL function can be used to replace NULL values with a specified value?
A) COALESCE
B) ISNULL
C) REPLACE
D) NVL
3. Which command would drop an index from a table?
A) DELETE INDEX
B) TRUNCATE INDEX
C) DROP INDEX
D) REMOVE INDEX
4. What is the purpose of using external tables in Oracle Database?
A) To manage data stored in external files using SQL
B) To improve the performance of complex queries
C) To store backup copies of database tables
D) To create temporary tables for session-specific data
5. What does the following SQL statement do?
SELECT e.employee_id, d.department_name
FROM employees e
JOIN departments d ON e.department_id = d.department_id;
A) Retrieves all employees and their departments
B) Retrieves only employees without departments
C) Retrieves employees and departments with matching department_id
D) Retrieves only departments with no employees
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: D | Question # 3 Answer: C | Question # 4 Answer: A | Question # 5 Answer: C |
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