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| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Using Functions | 25% | - Date arithmetic and date functions - Group functions and grouping data - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - Character functions for string manipulation - Restricting group results |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Sorting query results - Limiting rows and substitution variables - DEFINE and VERIFY commands - Operator precedence rules |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| DDL for Tables and Relationships | 15% | - Temporary and external tables - Constraints management - Drop columns, set unused columns - Views management - Table structure, columns, data types - TRUNCATE TABLE statement - CREATE TABLE statement |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
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NEW QUESTION # 23
What does the following query return?
SELECT ROUND(123.456, 1) AS rounded_value FROM dual;
Answer: B
NEW QUESTION # 24
Which of the following ensures that a relational database enforces data integrity?
Answer: D
NEW QUESTION # 25
What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);
Answer: C
NEW QUESTION # 26
Which Oracle SQL function returns the current date and time, including time zone information?
Answer: A
NEW QUESTION # 27
Which of the following can be achieved using a correlated subquery?
Answer: A
NEW QUESTION # 28
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