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Oracle 1Z0-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Constraints management - Drop columns, set unused columns - TRUNCATE TABLE statement - Table structure, columns, data types - Temporary and external tables - Views management |
| Topic 2: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 3: Using Functions | 25% | - Data type conversion: implicit and explicit - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - ROUND, TRUNC, MOD functions - Group functions and grouping data - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Restricting group results |
| Topic 4: Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Operator precedence rules - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Sorting query results |
| Topic 5: Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Topic 6: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Topic 7: Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 8: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Topic 9: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 10: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 11: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
Oracle Database 23ai SQL Associate Sample Questions:
1. What is the result of the following SQL query?
SELECT COALESCE(NULL, 100, 200) AS result FROM dual;
A) NULL
B) 100
C) 200
D) 300
2. Which of the following is true about foreign key constraints in SQL?
A) They define a relationship between two tables.
B) They ensure that a column only contains NULL values.
C) They enforce the uniqueness of values in a column.
3. What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;
A) Employees and their managers' IDs
B) All employees and their IDs
C) Employees who have managers
D) Employees who do not have managers
4. 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 10 INCREMENT BY -100;
D) CREATE SEQUENCE seq_1 START WITH 100 INCREMENT BY 10;
5. Which Oracle SQL function returns the current date and time, including time zone information?
A) CURRENT_DATE
B) CURRENT_TIMESTAMP
C) SYSDATE
D) NOW
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: C | Question # 4 Answer: D | Question # 5 Answer: B |
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