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| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - Nested functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Group functions and grouping data - Character functions for string manipulation - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| DDL for Tables and Relationships | 15% | - Temporary and external tables - Table structure, columns, data types - CREATE TABLE statement - Drop columns, set unused columns - TRUNCATE TABLE statement - Views management - Constraints management |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Retrieving and Sorting Data | 15% | - Sorting query results - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Operator precedence rules |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
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NEW QUESTION # 58
What is a role in Oracle Database?
Answer: C
NEW QUESTION # 59
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: B
NEW QUESTION # 60
Which command would drop an index from a table?
Answer: D
NEW QUESTION # 61
Which SQL function converts a string representation of a date into a date data type?
Answer: C
NEW QUESTION # 62
What is the primary purpose of an index in SQL?
Answer: B
NEW QUESTION # 63
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