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| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Data type conversion: implicit and explicit - Restricting group results - Nested functions - Character functions for string manipulation - Date arithmetic and date functions |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Operator precedence rules - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Sorting query results |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Temporary and external tables - Constraints management - Drop columns, set unused columns - Table structure, columns, data types - Views management - TRUNCATE TABLE statement |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
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NEW QUESTION # 71
What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;
Answer: B
NEW QUESTION # 72
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
Answer: D
NEW QUESTION # 73
Which operator can be used in a multiple-row subquery to match a single value to a list of values?
Answer: C
NEW QUESTION # 74
Which component of an ERD (Entity-Relationship Diagram) represents the attributes of an entity?
Answer: C
NEW QUESTION # 75
What does the following command do?
GRANT CREATE SESSION TO user_name;
Answer: A
NEW QUESTION # 76
......
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