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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Constraints management - Views management - Table structure, columns, data types - TRUNCATE TABLE statement - Temporary and external tables - Drop columns, set unused columns |
| Topic 2: Using Functions | 25% | - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Date arithmetic and date functions - Group functions and grouping data - Restricting group results - Nested functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Character functions for string manipulation |
| Topic 3: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 4: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 5: Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Topic 6: Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 7: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 8: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 9: Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Operator precedence rules - Sorting query results - Using SELECT statement and column aliases |
| Topic 10: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Topic 11: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
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NEW QUESTION # 102
How are NULL values treated in relational databases?
Answer: C
NEW QUESTION # 103
Which command is used to add a new column to an existing table?
Answer: C
NEW QUESTION # 104
What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;
Answer: D
NEW QUESTION # 105
Which command would drop an index from a table?
Answer: B
NEW QUESTION # 106
What is the primary purpose of a primary key in a relational database?
Answer: C
NEW QUESTION # 107
......
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