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| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - Temporary and external tables - TRUNCATE TABLE statement - Drop columns, set unused columns - CREATE TABLE statement - Constraints management - Table structure, columns, data types - Views management |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - DEFINE and VERIFY commands - Operator precedence rules - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - Sorting query results - Arithmetic expressions and NULL values |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Using Functions | 25% | - Date arithmetic and date functions - Character functions for string manipulation - Group functions and grouping data - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Nested functions - Restricting group results |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Using SET Operators | 5% | - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
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NEW QUESTION # 106
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: A
NEW QUESTION # 107
Which of the following is an example of an object privilege?
Answer: D
NEW QUESTION # 108
Which clause in a SQL SELECT statement is used to define the columns to be retrieved?
Answer: B
NEW QUESTION # 109
Which type of join includes rows that do not have matching values in the joined table?
Answer: D
NEW QUESTION # 110
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Answer: D
NEW QUESTION # 111
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