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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 2: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 3: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 4: Using Functions | 25% | - Restricting group results - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - ROUND, TRUNC, MOD functions - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Date arithmetic and date functions |
| Topic 5: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 6: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Topic 7: Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Topic 8: DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - Table structure, columns, data types - Temporary and external tables - TRUNCATE TABLE statement - CREATE TABLE statement - Constraints management - Views management |
| Topic 9: Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Operator precedence rules - Sorting query results |
| Topic 10: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 11: Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
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NEW QUESTION # 40
Which SQL clause can be used in Oracle to limit the number of rows returned?
Answer: C
NEW QUESTION # 41
What is the difference between UNION and UNION ALL?
Answer: A
NEW QUESTION # 42
Which of the following is true about foreign key constraints in SQL?
Answer: A
NEW QUESTION # 43
What does the COMMIT statement do in SQL?
Answer: B
NEW QUESTION # 44
Which SQL keyword is used to define a substitution variable in a SQL statement?
Answer: D
NEW QUESTION # 45
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