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| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - Views management - Constraints management - Drop columns, set unused columns - TRUNCATE TABLE statement - Table structure, columns, data types - Temporary and external tables - CREATE TABLE statement |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Using Functions | 25% | - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - Date arithmetic and date functions - Character functions for string manipulation - Restricting group results - Nested functions |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Sorting query results - Operator precedence rules - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Limiting rows and substitution variables |
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NEW QUESTION # 32
What is the purpose of using external tables in Oracle Database?
Answer: D
NEW QUESTION # 33
What will the following query do?
SELECT employee_id, salary
FROM employees
WHERE salary > (SELECT AVG(salary) FROM employees);
Answer: B
NEW QUESTION # 34
Which SQL function converts a string representation of a date into a date data type?
Answer: C
NEW QUESTION # 35
What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;
Answer: D
NEW QUESTION # 36
Which SQL statement is used to create a table?
Answer: D
NEW QUESTION # 37
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