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| Section | Weight | Objectives |
|---|---|---|
| Retrieving and Sorting Data | 15% | - Operator precedence rules - Sorting query results - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Arithmetic expressions and NULL values |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| 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 sequences - Create and manage indexes - Create and manage synonyms |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| DDL for Tables and Relationships | 15% | - Views management - Constraints management - Drop columns, set unused columns - CREATE TABLE statement - TRUNCATE TABLE statement - Temporary and external tables - Table structure, columns, data types |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Using Functions | 25% | - Group functions and grouping data - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Restricting group results - Nested functions - Date arithmetic and date functions |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
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NEW QUESTION # 82
Which SQL keyword is used to remove duplicate rows from the result set of a query?
Answer: A
NEW QUESTION # 83
Which SQL function calculates the number of months between two dates?
Response:
Answer: A
NEW QUESTION # 84
What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;
Answer: A
NEW QUESTION # 85
Which type of INSERT statement allows inserting rows into multiple tables using a single SELECT query?
Answer: A
NEW QUESTION # 86
What is the purpose of the DBA_OBJECTS data dictionary view?
Answer: D
NEW QUESTION # 87
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