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| Section | Weight | Objectives |
|---|---|---|
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Using Functions | 25% | - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Restricting group results - Date arithmetic and date functions - Character functions for string manipulation - Nested functions - Group functions and grouping data |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - Table structure, columns, data types - Views management - TRUNCATE TABLE statement - CREATE TABLE statement - Constraints management - Temporary and external tables |
| Retrieving and Sorting Data | 15% | - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Operator precedence rules - Arithmetic expressions and NULL values - Sorting query results - Limiting rows and substitution variables |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Relational Database Concepts | 5% | - SQL SELECT clauses and ERD components - Relationship between database and SQL - Relational database theoretical and physical aspects |
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NEW QUESTION # 26
Which type of INSERT statement allows inserting rows into multiple tables using a single SELECT query?
Answer: A
NEW QUESTION # 27
What does a Cartesian product in SQL result from?
Answer: A
NEW QUESTION # 28
What will the following SQL query return?
SELECT TRUNC(15.678, 2) AS truncated_value FROM dual;
Answer: C
NEW QUESTION # 29
What is a sequence in Oracle Database?
Answer: B
NEW QUESTION # 30
Which of the following can be achieved using a correlated subquery?
Answer: C
NEW QUESTION # 31
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