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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Topic 2: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 3: Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Topic 4: Using Functions | 25% | - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - NVL, NULLIF, COALESCE functions - Restricting group results - Nested functions - Character functions for string manipulation - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions |
| Topic 5: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Operator precedence rules - Sorting query results - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword |
| Topic 6: DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Views management - TRUNCATE TABLE statement - Table structure, columns, data types - Constraints management - Temporary and external tables - Drop columns, set unused columns |
| Topic 7: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 8: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 9: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 10: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Topic 11: Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
>> 1Z1-171 Exam Questions Answers <<
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NEW QUESTION # 71
Which clause in a SQL SELECT statement is used to define the columns to be retrieved?
Answer: A
NEW QUESTION # 72
What does a Cartesian product in SQL result from?
Answer: A
NEW QUESTION # 73
What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;
Answer: D
NEW QUESTION # 74
What is the relationship between SQL and a relational database?
Answer: B
NEW QUESTION # 75
Which SQL function calculates the number of months between two dates?
Response:
Answer: C
NEW QUESTION # 76
......
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