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| Section | Weight | Objectives |
|---|---|---|
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results - Operator precedence rules - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Using SELECT statement and column aliases |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| DDL for Tables and Relationships | 15% | - Temporary and external tables - Constraints management - Table structure, columns, data types - Drop columns, set unused columns - Views management - CREATE TABLE statement - TRUNCATE TABLE statement |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| 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 - Nested functions - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - Restricting group results - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data |
| Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
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NEW QUESTION # 23
What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;
Answer: C
NEW QUESTION # 24
Which of the following best describes a relational database?
Answer: C
NEW QUESTION # 25
Which of the following is an example of an object privilege?
Answer: A
NEW QUESTION # 26
How can you ensure that data is sorted in descending order in a SQL query?
Answer: D
NEW QUESTION # 27
What is the primary purpose of an index in SQL?
Answer: C
NEW QUESTION # 28
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