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| Section | Weight | Objectives |
|---|---|---|
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Table structure, columns, data types - Views management - Constraints management - TRUNCATE TABLE statement - Temporary and external tables - Drop columns, set unused columns |
| Using Functions | 25% | - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Data type conversion: implicit and explicit - Nested functions - Group functions and grouping data - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - ROUND, TRUNC, MOD functions |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Operator precedence rules - Using SELECT statement and column aliases - Sorting query results - DEFINE and VERIFY commands - Limiting rows and substitution variables |
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
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NEW QUESTION # 29
Which SQL keyword is used to remove duplicate rows from the result set of a query?
Answer: A
NEW QUESTION # 30
What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;
Answer: C
NEW QUESTION # 31
Which of the following is an example of an object privilege?
Answer: C
NEW QUESTION # 32
What is the purpose of a correlated subquery?
Answer: A
NEW QUESTION # 33
How can a synonym benefit database design?
Answer: D
NEW QUESTION # 34
......
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