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| Section | Weight | Objectives |
|---|---|---|
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Operator precedence rules - Using SELECT statement and column aliases - Limiting rows and substitution variables - Sorting query results - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Restricting group results - Character functions for string manipulation - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - Nested functions - Group functions and grouping data |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
| DDL for Tables and Relationships | 15% | - Table structure, columns, data types - TRUNCATE TABLE statement - Constraints management - CREATE TABLE statement - Drop columns, set unused columns - Views management - Temporary and external tables |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
Which clause can be used with SET operators to sort the final result set?
Correct Answer: D π³οΈ
What is a sequence in Oracle Database?
Correct Answer: D π³οΈ
What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);
Correct Answer: C π³οΈ
What happens when a unique index is created on a table column?
Correct Answer: B π³οΈ
Which clause is used to allow a user to grant a privilege to others?
Correct Answer: A π³οΈ
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