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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 2: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Topic 3: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 4: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Topic 5: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Topic 6: DDL for Tables and Relationships | 15% | - Temporary and external tables - Views management - Table structure, columns, data types - Drop columns, set unused columns - CREATE TABLE statement - TRUNCATE TABLE statement - Constraints management |
| Topic 7: Retrieving and Sorting Data | 15% | - Sorting query results - Limiting rows and substitution variables - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Operator precedence rules |
| Topic 8: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 9: Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Topic 10: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 11: Using Functions | 25% | - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Date arithmetic and date functions - Restricting group results - Group functions and grouping data - Nested functions - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
>> 1Z0-171 Latest Study Notes <<
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NEW QUESTION # 33
Which of the following SET operators combines results from two queries and removes duplicates?
Answer: D
NEW QUESTION # 34
Which of the following best describes a relational database?
Answer: C
NEW QUESTION # 35
Which of the following SQL commands retrieves data from a relational database?
Answer: D
NEW QUESTION # 36
Which data dictionary view provides information about all the columns in tables accessible to the current user?
Answer: B
NEW QUESTION # 37
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;
Answer: C
NEW QUESTION # 38
......
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