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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: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Topic 3: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 4: Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Date arithmetic and date functions - Restricting group results - Data type conversion: implicit and explicit - Nested functions - Character functions for string manipulation - Group functions and grouping data - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions |
| Topic 5: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 6: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 7: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 8: DDL for Tables and Relationships | 15% | - Temporary and external tables - TRUNCATE TABLE statement - Views management - Constraints management - CREATE TABLE statement - Drop columns, set unused columns - Table structure, columns, data types |
| Topic 9: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Topic 10: Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Topic 11: Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operator precedence rules - Operators, literals, DISTINCT keyword - Sorting query results - Limiting rows and substitution variables - Arithmetic expressions and NULL values - DEFINE and VERIFY commands |
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NEW QUESTION # 85
What does the following query return?
SELECT ROUND(123.456, 1) AS rounded_value FROM dual;
Answer: D
NEW QUESTION # 86
What does the COMMIT statement do in SQL?
Answer: B
NEW QUESTION # 87
Which type of INSERT statement allows inserting rows into multiple tables using a single SELECT query?
Answer: A
NEW QUESTION # 88
What does the INTERSECT operator do in SQL?
Answer: A
NEW QUESTION # 89
Which function returns the current system date and time in the database session's time zone?
Answer: C
NEW QUESTION # 90
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