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| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Data type conversion: implicit and explicit - Character functions for string manipulation - NVL, NULLIF, COALESCE functions - Nested functions - Date arithmetic and date functions - Restricting group results - Group functions and grouping data - ROUND, TRUNC, MOD functions |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
| DDL for Tables and Relationships | 15% | - Views management - Constraints management - CREATE TABLE statement - Temporary and external tables - Table structure, columns, data types - Drop columns, set unused columns - TRUNCATE TABLE statement |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Retrieving and Sorting Data | 15% | - Sorting query results - Using SELECT statement and column aliases - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Operator precedence rules - DEFINE and VERIFY commands |
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NEW QUESTION # 35
Which component of an ERD (Entity-Relationship Diagram) represents the attributes of an entity?
Answer: A
NEW QUESTION # 36
What happens if a DELETE statement is executed without a WHERE clause?
Answer: C
NEW QUESTION # 37
Which type of join includes rows that do not have matching values in the joined table?
Answer: C
NEW QUESTION # 38
Which INTERVAL data type would you use to store a period of time in years and months?
Answer: D
NEW QUESTION # 39
What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;
Answer: B
NEW QUESTION # 40
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