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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 2: Using Functions | 25% | - Group functions and grouping data - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - ROUND, TRUNC, MOD functions - Date arithmetic and date functions - Data type conversion: implicit and explicit |
| Topic 3: Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Topic 4: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 5: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Constraints management - CREATE TABLE statement - Temporary and external tables - Views management - TRUNCATE TABLE statement - Drop columns, set unused columns |
| Topic 6: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 7: Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Topic 8: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Topic 9: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 10: Retrieving and Sorting Data | 15% | - Operator precedence rules - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Sorting query results |
| Topic 11: Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
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NEW QUESTION # 45
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
Answer: D
NEW QUESTION # 46
What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;
Answer: C
NEW QUESTION # 47
What does a Cartesian product in SQL result from?
Answer: C
NEW QUESTION # 48
Which SQL clause is used to specify the source table in a query?
Answer: D
NEW QUESTION # 49
Which type of join returns all rows from the left table, even if there are no matches in the right table?
Answer: C
NEW QUESTION # 50
......
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