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| Section | Weight | Objectives |
|---|---|---|
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| 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% | - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Sorting query results - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Operator precedence rules |
| DDL for Tables and Relationships | 15% | - Views management - Table structure, columns, data types - TRUNCATE TABLE statement - CREATE TABLE statement - Temporary and external tables - Drop columns, set unused columns - Constraints management |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Date arithmetic and date functions - Group functions and grouping data - Restricting group results - NVL, NULLIF, COALESCE functions - Nested functions - Character functions for string manipulation - Data type conversion: implicit and explicit |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
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NEW QUESTION # 25
Which of the following statements is true about constraints in Oracle Database?
Answer: A
NEW QUESTION # 26
What will the following SQL query return?
SELECT TRUNC(15.678, 2) AS truncated_value FROM dual;
Answer: B
NEW QUESTION # 27
Which of the following ensures that a relational database enforces data integrity?
Answer: A
NEW QUESTION # 28
What does the following query return?
SELECT ROUND(123.456, 1) AS rounded_value FROM dual;
Answer: B
NEW QUESTION # 29
Which command revokes a user's privilege to update a table?
Answer: B
NEW QUESTION # 30
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