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| Section | Weight | Objectives |
|---|---|---|
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Character functions for string manipulation - Restricting group results - NVL, NULLIF, COALESCE functions - Nested functions - Data type conversion: implicit and explicit - Group functions and grouping data - Date arithmetic and date functions |
| Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Sorting query results - DEFINE and VERIFY commands - Operator precedence rules - Using SELECT statement and column aliases |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Temporary and external tables - CREATE TABLE statement - Drop columns, set unused columns - Constraints management - Views management - Table structure, columns, data types |
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NEW QUESTION # 41
How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?
Answer: D
NEW QUESTION # 42
What does the COMMIT statement do in SQL?
Answer: A
NEW QUESTION # 43
Which SQL function can be used to replace NULL values with a specified value?
Answer: B
NEW QUESTION # 44
Which command revokes a user's privilege to update a table?
Answer: B
NEW QUESTION # 45
Which data dictionary view lists all indexes created by the current user?
Answer: A
NEW QUESTION # 46
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