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| Section | Weight | Objectives |
|---|---|---|
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Drop columns, set unused columns - Table structure, columns, data types - CREATE TABLE statement - Views management - Constraints management - Temporary and external tables |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Sorting query results - Operator precedence rules - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword |
| Using Functions | 25% | - Nested functions - Data type conversion: implicit and explicit - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - Restricting group results - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Date arithmetic and date functions |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects - Relationship between database and SQL |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
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NEW QUESTION # 17
Which type of join retrieves only the rows with matching values in both tables?
Answer: C
NEW QUESTION # 18
Which of the following is true about foreign key constraints in SQL?
Answer: C
NEW QUESTION # 19
What happens if a DELETE statement is executed without a WHERE clause?
Answer: A
NEW QUESTION # 20
What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;
Answer: A
NEW QUESTION # 21
Which SQL function calculates the number of months between two dates?
Response:
Answer: D
NEW QUESTION # 22
......
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