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| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operator precedence rules - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results - Limiting rows and substitution variables |
| Using Functions | 25% | - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Date arithmetic and date functions - Group functions and grouping data - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - Nested functions |
| Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| DDL for Tables and Relationships | 15% | - Views management - CREATE TABLE statement - Drop columns, set unused columns - Table structure, columns, data types - TRUNCATE TABLE statement - Constraints management - Temporary and external tables |
| Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
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NEW QUESTION # 74
Which clause is used to ensure that only specific rows are deleted in a DELETE statement?
Answer: B
NEW QUESTION # 75
What is a role in Oracle Database?
Answer: D
NEW QUESTION # 76
Which SQL clause can be used in Oracle to limit the number of rows returned?
Answer: A
NEW QUESTION # 77
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: C
NEW QUESTION # 78
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;
Answer: C
NEW QUESTION # 79
......
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