Pass test with the help of 1Z0-171 actual exam materials
Last Updated: Aug 03, 2026
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| Section | Weight | Objectives |
|---|---|---|
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operator precedence rules - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Sorting query results |
| Using Functions | 25% | - Date arithmetic and date functions - Restricting group results - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Group functions and grouping data - Nested functions |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Temporary and external tables - Constraints management - Table structure, columns, data types - Views management - Drop columns, set unused columns - CREATE TABLE statement |
| 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 |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
1. Which SET operator returns rows from the first query that are not present in the second query?
A) INTERSECT
B) MINUS
C) UNION
D) UNION ALL
2. What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
A) Department IDs that exist in both the departments and employees tables
B) Department IDs that exist only in the employees table
C) All department IDs from the employees table
D) All department IDs from the departments table
3. What is a SELF JOIN in SQL?
A) A join used for Cartesian products
B) A join that does not require a WHERE clause
C) A join between tables with identical structures
D) A join of a table with itself
4. Which type of subquery returns exactly one value?
A) Multiple-row subquery
B) Scalar subquery
C) Inline view
D) Correlated subquery
5. 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
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: B | Question # 5 Answer: D |
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