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| Section | Weight | Objectives |
|---|---|---|
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| DDL for Tables and Relationships | 15% | - Temporary and external tables - TRUNCATE TABLE statement - Constraints management - Views management - Drop columns, set unused columns - CREATE TABLE statement - Table structure, columns, data types |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Operator precedence rules - Sorting query results - DEFINE and VERIFY commands - Arithmetic expressions and NULL values |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
| Using Functions | 25% | - Restricting group results - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Character functions for string manipulation - Nested functions - Data type conversion: implicit and explicit - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions |
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NEW QUESTION # 71
What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;
Answer: A
NEW QUESTION # 72
Which SQL function can be used to replace NULL values with a specified value?
Answer: B
NEW QUESTION # 73
What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;
Answer: D
NEW QUESTION # 74
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
Answer: A
NEW QUESTION # 75
Which SQL function converts a string representation of a date into a date data type?
Answer: A
NEW QUESTION # 76
......
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