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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Topic 2: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Topic 3: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Topic 4: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 5: DDL for Tables and Relationships | 15% | - Temporary and external tables - TRUNCATE TABLE statement - Constraints management - Table structure, columns, data types - Views management - CREATE TABLE statement - Drop columns, set unused columns |
| Topic 6: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 7: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Topic 8: Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Operator precedence rules - Limiting rows and substitution variables - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Sorting query results |
| Topic 9: Using Functions | 25% | - Nested functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Restricting group results - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions |
| Topic 10: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 11: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
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NEW QUESTION # 88
Which command is used to add a new column to an existing table?
Answer: D
NEW QUESTION # 89
Which type of join retrieves only the rows with matching values in both tables?
Answer: C
NEW QUESTION # 90
Which clause is used to ensure that only specific rows are deleted in a DELETE statement?
Answer: B
NEW QUESTION # 91
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: B
NEW QUESTION # 92
What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;
Answer: D
NEW QUESTION # 93
......
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