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| Section | Weight | Objectives |
|---|---|---|
| Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Operator precedence rules - DEFINE and VERIFY commands - Sorting query results - Arithmetic expressions and NULL values - Limiting rows and substitution variables |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - CREATE TABLE statement - Temporary and external tables - Constraints management - Table structure, columns, data types - Views management - Drop columns, set unused columns |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Using Functions | 25% | - Date arithmetic and date functions - Restricting group results - Group functions and grouping data - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - Nested functions - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
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NEW QUESTION # 43
Which of the following SQL commands retrieves data from a relational database?
Answer: A
NEW QUESTION # 44
Which SET operator returns rows from the first query that are not present in the second query?
Answer: C
NEW QUESTION # 45
How are NULL values treated in relational databases?
Answer: C
NEW QUESTION # 46
What is the purpose of the DBA_OBJECTS data dictionary view?
Answer: A
NEW QUESTION # 47
What is a role in Oracle Database?
Answer: C
NEW QUESTION # 48
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