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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 2: DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Views management - Constraints management - Temporary and external tables - CREATE TABLE statement - Drop columns, set unused columns - Table structure, columns, data types |
| 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: Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 5: Retrieving and Sorting Data | 15% | - Sorting query results - Limiting rows and substitution variables - Operator precedence rules - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Arithmetic expressions and NULL values |
| Topic 6: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Topic 7: Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Topic 8: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 9: Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Topic 10: Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Topic 11: Using Functions | 25% | - Character functions for string manipulation - Group functions and grouping data - Date arithmetic and date functions - Restricting group results - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions |
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NEW QUESTION # 99
What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;
Answer: C
NEW QUESTION # 100
Which data dictionary view provides information about all the columns in tables accessible to the current user?
Answer: C
NEW QUESTION # 101
Which command would drop an index from a table?
Answer: D
NEW QUESTION # 102
What is required for the queries combined by a SET operator to work correctly?
Answer: A
NEW QUESTION # 103
What is a subquery in SQL?
Answer: B
NEW QUESTION # 104
......
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