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| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Sorting query results - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Operator precedence rules - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases |
| Using Functions | 25% | - Restricting group results - Date arithmetic and date functions - Data type conversion: implicit and explicit - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Nested functions - Group functions and grouping data |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| DDL for Tables and Relationships | 15% | - Constraints management - TRUNCATE TABLE statement - Views management - Table structure, columns, data types - Temporary and external tables - CREATE TABLE statement - Drop columns, set unused columns |
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NEW QUESTION # 48
What does a Cartesian product in SQL result from?
Answer: C
NEW QUESTION # 49
Which SQL function calculates the number of months between two dates?
Response:
Answer: B
NEW QUESTION # 50
Which data dictionary view lists all indexes created by the current user?
Answer: B
NEW QUESTION # 51
Which of the following statements creates an ascending sequence starting at 100 and incrementing by 10?
Answer: B
NEW QUESTION # 52
What is the purpose of a correlated subquery?
Answer: C
NEW QUESTION # 53
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