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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 2: Using Functions | 25% | - Group functions and grouping data - Character functions for string manipulation - Restricting group results - Date arithmetic and date functions - Nested functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions |
| Topic 3: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 4: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 5: Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Topic 6: Retrieving and Sorting Data | 15% | - Arithmetic expressions and NULL values - Sorting query results - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operator precedence rules - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword |
| Topic 7: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 8: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Topic 9: DDL for Tables and Relationships | 15% | - Temporary and external tables - Views management - CREATE TABLE statement - Table structure, columns, data types - TRUNCATE TABLE statement - Constraints management - Drop columns, set unused columns |
| Topic 10: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Topic 11: Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
>> Valid Braindumps 1Z0-171 Sheet <<
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NEW QUESTION # 76
What is required for the queries combined by a SET operator to work correctly?
Answer: B
NEW QUESTION # 77
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: C
NEW QUESTION # 78
Which SQL function calculates the number of months between two dates?
Response:
Answer: C
NEW QUESTION # 79
What is the difference between UNION and UNION ALL?
Answer: C
NEW QUESTION # 80
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;
Answer: B
NEW QUESTION # 81
......
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