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| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - Date arithmetic and date functions - Group functions and grouping data - Nested functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Restricting group results - Character functions for string manipulation - ROUND, TRUNC, MOD functions |
| DDL for Tables and Relationships | 15% | - Temporary and external tables - Drop columns, set unused columns - CREATE TABLE statement - Constraints management - Views management - TRUNCATE TABLE statement - Table structure, columns, data types |
| 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 |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Sorting query results - Limiting rows and substitution variables - Operator precedence rules - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
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NEW QUESTION # 52
Which type of privilege allows a user to perform administrative tasks, such as creating other users?
Answer: B
NEW QUESTION # 53
Which of the following SQL commands retrieves data from a relational database?
Answer: A
NEW QUESTION # 54
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: B
NEW QUESTION # 55
Which of the following is true about foreign key constraints in SQL?
Answer: B
NEW QUESTION # 56
Which INTERVAL data type would you use to store a period of time in years and months?
Answer: C
NEW QUESTION # 57
......
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