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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving and Sorting Data | 15% | - Sorting query results - Limiting rows and substitution variables - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Operator precedence rules - DEFINE and VERIFY commands |
| Topic 2: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 3: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Topic 4: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Topic 5: Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 6: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 7: Using Functions | 25% | - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Character functions for string manipulation - ROUND, TRUNC, MOD functions - Nested functions - Group functions and grouping data - Date arithmetic and date functions |
| Topic 8: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Topic 9: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 10: DDL for Tables and Relationships | 15% | - Table structure, columns, data types - Views management - Temporary and external tables - Drop columns, set unused columns - Constraints management - TRUNCATE TABLE statement - CREATE TABLE statement |
| Topic 11: Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
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NEW QUESTION # 97
How can you ensure that data is sorted in descending order in a SQL query?
Answer: B
NEW QUESTION # 98
Which type of join returns all rows from the left table, even if there are no matches in the right table?
Answer: A
NEW QUESTION # 99
Which of the following can be achieved using a correlated subquery?
Answer: C
NEW QUESTION # 100
Which SQL clause can be used in Oracle to limit the number of rows returned?
Answer: C
NEW QUESTION # 101
What does the following SQL statement do?
CREATE TABLE employees (
employee_id NUMBER PRIMARY KEY,
first_name VARCHAR2(50),
hire_date DATE NOT NULL
);
Answer: C
NEW QUESTION # 102
......
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