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| Section | Weight | Objectives |
|---|---|---|
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| DDL for Tables and Relationships | 15% | - Table structure, columns, data types - CREATE TABLE statement - Temporary and external tables - Drop columns, set unused columns - Constraints management - Views management - TRUNCATE TABLE statement |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - Sorting query results - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Operator precedence rules |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Using Functions | 25% | - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Nested functions - Data type conversion: implicit and explicit - Date arithmetic and date functions - Group functions and grouping data - ROUND, TRUNC, MOD functions - Character functions for string manipulation |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
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NEW QUESTION # 52
Which data dictionary view provides information about all tables accessible to the current user?
Answer: C
NEW QUESTION # 53
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
Answer: C
NEW QUESTION # 54
Which of the following is a valid reason to create a synonym?
Answer: D
NEW QUESTION # 55
Which of the following statements creates an ascending sequence starting at 100 and incrementing by 10?
Answer: A
NEW QUESTION # 56
What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);
Answer: D
NEW QUESTION # 57
......
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