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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Operator precedence rules - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Sorting query results - DEFINE and VERIFY commands - Using SELECT statement and column aliases |
| Topic 2: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Topic 3: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 4: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 5: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 6: DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - Table structure, columns, data types - Temporary and external tables - TRUNCATE TABLE statement - Constraints management - CREATE TABLE statement - Views management |
| Topic 7: Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Topic 8: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 9: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 10: Using Functions | 25% | - Character functions for string manipulation - ROUND, TRUNC, MOD functions - Date arithmetic and date functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Nested functions - Data type conversion: implicit and explicit |
| Topic 11: Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
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NEW QUESTION # 14
Which SQL function calculates the number of months between two dates?
Response:
Answer: B
NEW QUESTION # 15
Which command revokes a user's privilege to update a table?
Answer: D
NEW QUESTION # 16
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;
Answer: A
NEW QUESTION # 17
Which function returns the current system date and time in the database session's time zone?
Answer: C
NEW QUESTION # 18
Which of the following SET operators combines results from two queries and removes duplicates?
Answer: C
NEW QUESTION # 19
......
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