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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Topic 2: Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Topic 3: Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Limiting rows and substitution variables - Sorting query results - Arithmetic expressions and NULL values - Operator precedence rules - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword |
| Topic 4: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 5: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 6: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 7: Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 8: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 9: Using Functions | 25% | - Restricting group results - Group functions and grouping data - Date arithmetic and date functions - Nested functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Topic 10: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Drop columns, set unused columns - Temporary and external tables - Constraints management - TRUNCATE TABLE statement - Views management - CREATE TABLE statement |
| Topic 11: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
1. What happens when the TRUNCATE TABLE statement is executed?
A) Deletes all rows in the table without logging the operation for rollback
B) Deletes the table structure permanently
C) Deletes all rows in the table and logs the operation for rollback
D) Deletes only the last row in the table
2. Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
A) WHERE
B) HAVING
C) FROM
D) SET
3. How does SQL handle NULL values in arithmetic expressions?
A) Treats them as the largest possible number
B) Produces a NULL result
C) Produces an error
D) Treats them as zero
4. 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 and their managers' IDs
B) Employees who do not have managers
C) All employees and their IDs
D) Employees who have managers
5. Which operator can be used in a multiple-row subquery to match a single value to a list of values?
A) IN
B) EXISTS
C) NOT NULL
D) =
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: D | Question # 3 Answer: B | Question # 4 Answer: D | Question # 5 Answer: A |
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