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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| Topic 2: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 3: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Drop columns, set unused columns - Temporary and external tables - Views management - TRUNCATE TABLE statement - CREATE TABLE statement - Constraints management |
| Topic 4: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Topic 5: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Topic 6: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 7: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 8: Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Topic 9: Using Functions | 25% | - Date arithmetic and date functions - Character functions for string manipulation - Restricting group results - Nested functions - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data |
| Topic 10: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Topic 11: Retrieving and Sorting Data | 15% | - Sorting query results - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operator precedence rules |
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NEW QUESTION # 77
What is the output of the following query?
SELECT CURRENT_DATE FROM dual;
Answer: B
NEW QUESTION # 78
What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;
Answer: A
NEW QUESTION # 79
Which command is used to add a new column to an existing table?
Answer: C
NEW QUESTION # 80
What is the purpose of a correlated subquery?
Answer: A
NEW QUESTION # 81
What does the EXISTS operator check in a subquery?
Answer: A
NEW QUESTION # 82
......
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