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| Section | Weight | Objectives |
|---|---|---|
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Using Functions | 25% | - Nested functions - Date arithmetic and date functions - Group functions and grouping data - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Character functions for string manipulation |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Sorting query results - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| DDL for Tables and Relationships | 15% | - Constraints management - Views management - TRUNCATE TABLE statement - Table structure, columns, data types - Drop columns, set unused columns - CREATE TABLE statement - Temporary and external tables |
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NEW QUESTION # 97
What does the NEXTVAL pseudocolumn do in SQL?
Answer: C
NEW QUESTION # 98
What happens if a privilege is revoked from a user who has granted the same privilege to others?
Answer: D
NEW QUESTION # 99
What is the primary purpose of a primary key in a relational database?
Answer: B
NEW QUESTION # 100
Which of the following SQL commands retrieves data from a relational database?
Answer: D
NEW QUESTION # 101
What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;
Answer: D
NEW QUESTION # 102
......
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