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| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - Nested functions - Group functions and grouping data - Restricting group results - Date arithmetic and date functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions |
| DDL for Tables and Relationships | 15% | - Temporary and external tables - Table structure, columns, data types - Drop columns, set unused columns - Views management - Constraints management - TRUNCATE TABLE statement - CREATE TABLE statement |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - Operators, literals, DISTINCT keyword - Sorting query results - Limiting rows and substitution variables - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Arithmetic expressions and NULL values |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
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NEW QUESTION # 12
Which SQL clause can be used in Oracle to limit the number of rows returned?
Answer: A
NEW QUESTION # 13
What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;
Answer: C
NEW QUESTION # 14
Which of the following ensures that a relational database enforces data integrity?
Answer: C
NEW QUESTION # 15
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
Answer: C
NEW QUESTION # 16
What does the COMMIT statement do in SQL?
Answer: B
NEW QUESTION # 17
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