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Last Updated: Oct 09, 2026
No. of Questions: 111 Questions & Answers with Testing Engine
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - CREATE TABLE statement - Constraints management - Temporary and external tables - Views management - Drop columns, set unused columns - Table structure, columns, data types |
| Topic 2: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 3: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 4: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 5: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 6: Using Functions | 25% | - Group functions and grouping data - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Nested functions - Restricting group results - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Date arithmetic and date functions |
| Topic 7: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 8: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 9: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 10: Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Sorting query results - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Operator precedence rules |
| Topic 11: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);
Correct Answer: B 🗳️
Which of the following data dictionary views provides information about constraints on tables?
Correct Answer: A 🗳️
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
Correct Answer: B 🗳️
How can you ensure that data is sorted in descending order in a SQL query?
Correct Answer: D 🗳️
What does the EXISTS operator check in a subquery?
Correct Answer: B 🗳️
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