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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Topic 2: Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Topic 3: Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Topic 4: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Topic 5: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Table structure, columns, data types - Temporary and external tables - Views management - Constraints management - Drop columns, set unused columns - TRUNCATE TABLE statement |
| Topic 6: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 7: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 8: Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Operator precedence rules - Using SELECT statement and column aliases - Limiting rows and substitution variables - Sorting query results |
| Topic 9: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 10: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 11: Using Functions | 25% | - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Restricting group results - ROUND, TRUNC, MOD functions - Character functions for string manipulation - Date arithmetic and date functions |
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NEW QUESTION # 48
What is the primary purpose of a primary key in a relational database?
Answer: C
NEW QUESTION # 49
Which command grants a user the ability to query data from a specific table?
Answer: D
NEW QUESTION # 50
What is the primary purpose of an index in SQL?
Answer: B
NEW QUESTION # 51
What is the purpose of the MERGE statement in SQL?
Answer: D
NEW QUESTION # 52
Which clause is used to ensure that only specific rows are deleted in a DELETE statement?
Answer: B
NEW QUESTION # 53
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