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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Functions | 25% | - Restricting group results - Group functions and grouping data - Character functions for string manipulation - Date arithmetic and date functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Nested functions |
| Topic 2: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 3: Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Topic 4: DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Drop columns, set unused columns - CREATE TABLE statement - Views management - Constraints management - Temporary and external tables - Table structure, columns, data types |
| Topic 5: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 6: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 7: Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Topic 8: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 9: Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Topic 10: Retrieving and Sorting Data | 15% | - Sorting query results - Operator precedence rules - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - DEFINE and VERIFY commands |
| Topic 11: Controlling User Access | 5% | - Granting privileges on tables - Roles creation and privilege assignment - System vs object privileges |
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NEW QUESTION # 91
What happens when the maximum value of a sequence is reached?
Answer: D
NEW QUESTION # 92
Which clause in a SQL SELECT statement is used to define the columns to be retrieved?
Answer: A
NEW QUESTION # 93
What does the following query return?
SELECT ROUND(123.456, 1) AS rounded_value FROM dual;
Answer: B
NEW QUESTION # 94
Which command grants a user the ability to query data from a specific table?
Answer: B
NEW QUESTION # 95
Which command is used to add a new column to an existing table?
Answer: D
NEW QUESTION # 96
......
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