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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 2: Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Group functions and grouping data - Date arithmetic and date functions - Nested functions - Restricting group results - ROUND, TRUNC, MOD functions |
| Topic 3: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - DEFINE and VERIFY commands - Operator precedence rules - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Sorting query results - Operators, literals, DISTINCT keyword |
| Topic 4: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 5: Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Topic 6: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 7: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Topic 8: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Topic 9: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 10: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Topic 11: DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Temporary and external tables - Drop columns, set unused columns - Views management - Constraints management - Table structure, columns, data types - CREATE TABLE statement |
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NEW QUESTION # 18
Which SQL statement is used to create a table?
Answer: D
NEW QUESTION # 19
How does SQL handle NULL values in arithmetic expressions?
Answer: B
NEW QUESTION # 20
Which command is used to add a new column to an existing table?
Answer: D
NEW QUESTION # 21
Which of the following best describes a relational database?
Answer: A
NEW QUESTION # 22
Which type of subquery returns exactly one value?
Answer: A
NEW QUESTION # 23
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