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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Topic 2: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 3: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 4: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Operator precedence rules - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Sorting query results - DEFINE and VERIFY commands |
| Topic 5: Using Functions | 25% | - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - Nested functions - Restricting group results - Group functions and grouping data - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Date arithmetic and date functions |
| Topic 6: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 7: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 8: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 9: DDL for Tables and Relationships | 15% | - Temporary and external tables - Drop columns, set unused columns - Views management - CREATE TABLE statement - Table structure, columns, data types - TRUNCATE TABLE statement - Constraints management |
| Topic 10: Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Topic 11: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
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NEW QUESTION # 13
What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;
Answer: B
NEW QUESTION # 14
What will the following SQL query return?
SELECT TRUNC(15.678, 2) AS truncated_value FROM dual;
Answer: C
NEW QUESTION # 15
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: D
NEW QUESTION # 16
Which of the following SET operators combines results from two queries and removes duplicates?
Answer: B
NEW QUESTION # 17
Which SQL function converts a string representation of a date into a date data type?
Answer: C
NEW QUESTION # 18
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