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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving and Sorting Data | 15% | - Operator precedence rules - Arithmetic expressions and NULL values - Sorting query results - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Limiting rows and substitution variables |
| Topic 2: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Topic 3: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Temporary and external tables - Constraints management - TRUNCATE TABLE statement - Views management - Table structure, columns, data types - Drop columns, set unused columns |
| Topic 4: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 5: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 6: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 7: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 8: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 9: Using Functions | 25% | - Nested functions - Date arithmetic and date functions - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Group functions and grouping data |
| Topic 10: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Topic 11: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
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NEW QUESTION # 94
What does the following SQL query return?
SELECT employee_id, salary * 12 AS annual_salary FROM employees;
Answer: C
NEW QUESTION # 95
Which operator can be used in a multiple-row subquery to match a single value to a list of values?
Answer: C
NEW QUESTION # 96
Which clause can be used with SET operators to sort the final result set?
Answer: C
NEW QUESTION # 97
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: C
NEW QUESTION # 98
Which command revokes a user's privilege to update a table?
Answer: A
NEW QUESTION # 99
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