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| Section | Weight | Objectives |
|---|---|---|
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Operator precedence rules - Limiting rows and substitution variables - Sorting query results |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Temporary and external tables - CREATE TABLE statement - Views management - Constraints management - Table structure, columns, data types - Drop columns, set unused columns |
| Using Functions | 25% | - Group functions and grouping data - Data type conversion: implicit and explicit - Nested functions - Restricting group results - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
1. Which of the following SET operators combines results from two queries and removes duplicates?
A) MINUS
B) UNION ALL
C) INTERSECT
D) UNION
2. What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;
A) Employees who have managers
B) All employees and their IDs
C) Employees and their managers' IDs
D) Employees who do not have managers
3. Which of the following statements is true about constraints in Oracle Database?
A) Constraints cannot reference other tables.
B) Constraints can only be added when creating a table.
C) Constraints are automatically dropped when rows are deleted.
D) Constraints can be added or modified using the ALTER TABLE statement.
4. How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?
A) LOCALTIMESTAMP omits time zone information, while CURRENT_TIMESTAMP includes it.
B) LOCALTIMESTAMP returns only the date, while CURRENT_TIMESTAMP returns the date and time.
C) LOCALTIMESTAMP does not include fractional seconds, while CURRENT_TIMESTAMP does.
D) Both functions are identical in output.
5. What is a role in Oracle Database?
A) A database object used to enforce constraints
B) A user-defined function
C) A set of privileges that can be granted to users or other roles
D) A predefined SQL statement stored in the database
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: A | Question # 5 Answer: C |
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