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| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - Data type conversion: implicit and explicit - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Nested functions - Restricting group results |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Sorting query results - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword |
| DDL for Tables and Relationships | 15% | - Table structure, columns, data types - TRUNCATE TABLE statement - Views management - CREATE TABLE statement - Temporary and external tables - Drop columns, set unused columns - Constraints management |
| Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
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NEW QUESTION # 56
What happens when the maximum value of a sequence is reached?
Answer: B
NEW QUESTION # 57
What is the default order of evaluation when multiple SET operators are used in a query?
Answer: A
NEW QUESTION # 58
What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;
Answer: D
NEW QUESTION # 59
Which of the following can be achieved using a correlated subquery?
Answer: B
NEW QUESTION # 60
Which SQL keyword is used to define a substitution variable in a SQL statement?
Answer: B
NEW QUESTION # 61
......
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