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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - ROUND, TRUNC, MOD functions - Restricting group results - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Nested functions - Date arithmetic and date functions |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - Sorting query results - Operator precedence rules - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - DEFINE and VERIFY commands |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| DDL for Tables and Relationships | 15% | - Views management - Temporary and external tables - CREATE TABLE statement - TRUNCATE TABLE statement - Constraints management - Table structure, columns, data types - Drop columns, set unused columns |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
Oracle Database 23ai SQL Associate Sample Questions:
1. Which type of join includes rows that do not have matching values in the joined table?
A) CROSS JOIN
B) OUTER JOIN
C) SELF JOIN
D) INNER JOIN
2. What is a subquery in SQL?
A) A query inside another query
B) A query that combines data from multiple tables
C) A query used to create a table
D) A query used for joining two or more tables
3. Which INTERVAL data type would you use to store a period of time in years and months?
A) INTERVAL MINUTE TO HOUR
B) INTERVAL MONTH TO DAY
C) INTERVAL DAY TO SECOND
D) INTERVAL YEAR TO MONTH
4. 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) All employees and their IDs
B) Employees and their managers' IDs
C) Employees who do not have managers
D) Employees who have managers
5. Which function returns the current system date and time in the database session's time zone?
A) SYSDATE
B) CURRENT_TIMESTAMP
C) SYSTEM_TIME
D) LOCAL_TIME
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: D | Question # 5 Answer: B |
