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| Section | Weight | Objectives |
|---|---|---|
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - DEFINE and VERIFY commands - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Sorting query results |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Constraints management - Views management - Drop columns, set unused columns - Table structure, columns, data types - Temporary and external tables - TRUNCATE TABLE statement |
| Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Functions | 25% | - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Data type conversion: implicit and explicit - Group functions and grouping data - Restricting group results - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
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NEW QUESTION # 70
Which of the following ensures that a relational database enforces data integrity?
Answer: A
NEW QUESTION # 71
What is the default order of evaluation when multiple SET operators are used in a query?
Answer: B
NEW QUESTION # 72
What happens when the maximum value of a sequence is reached?
Answer: A
NEW QUESTION # 73
What is the purpose of using external tables in Oracle Database?
Answer: B
NEW QUESTION # 74
Which of the following SET operators combines results from two queries and removes duplicates?
Answer: B
NEW QUESTION # 75
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