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| Section | Weight | Objectives |
|---|---|---|
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| Using Functions | 25% | - Restricting group results - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - Nested functions - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Character functions for string manipulation |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - CREATE TABLE statement - TRUNCATE TABLE statement - Table structure, columns, data types - Constraints management - Views management - Temporary and external tables |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
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NEW QUESTION # 69
What is the relationship between SQL and a relational database?
Answer: A
NEW QUESTION # 70
What is the purpose of the SAVEPOINT statement?
Answer: B
NEW QUESTION # 71
Which SQL function calculates the number of months between two dates?
Response:
Answer: A
NEW QUESTION # 72
What is the primary purpose of a primary key in a relational database?
Answer: A
NEW QUESTION # 73
In a relational database, what is a foreign key?
Answer: B
NEW QUESTION # 74
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