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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: DDL for Tables and Relationships | 15% | - Constraints management - TRUNCATE TABLE statement - Table structure, columns, data types - CREATE TABLE statement - Temporary and external tables - Drop columns, set unused columns - Views management |
| Topic 2: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Topic 3: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 4: Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Operator precedence rules - Sorting query results - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands |
| Topic 5: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Topic 6: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Topic 7: Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Topic 8: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Topic 9: Using Functions | 25% | - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Character functions for string manipulation - Nested functions - ROUND, TRUNC, MOD functions - Group functions and grouping data |
| Topic 10: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 11: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Which SQL function can be used to replace NULL values with a specified value?
Which data dictionary view lists all indexes created by the current user?
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;
What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;
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