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| Section | Weight | Objectives |
|---|---|---|
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Using Functions | 25% | - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Character functions for string manipulation - Data type conversion: implicit and explicit - Date arithmetic and date functions - Group functions and grouping data - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Limiting rows and substitution variables - Sorting query results - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Operator precedence rules |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Drop columns, set unused columns - TRUNCATE TABLE statement - Table structure, columns, data types - Constraints management - Temporary and external tables - Views management |
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NEW QUESTION # 108
What happens when the maximum value of a sequence is reached?
Answer: C
NEW QUESTION # 109
Which SQL statement is used to insert a new row into a table?
Answer: C
NEW QUESTION # 110
What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;
Answer: A
NEW QUESTION # 111
What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;
Answer: D
NEW QUESTION # 112
Which command revokes a user's privilege to update a table?
Answer: C
NEW QUESTION # 113
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