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| Section | Weight | Objectives |
|---|---|---|
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage synonyms - Create and manage sequences |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Using Functions | 25% | - NVL, NULLIF, COALESCE functions - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Nested functions - Restricting group results - Date arithmetic and date functions - Character functions for string manipulation |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - Table structure, columns, data types - Drop columns, set unused columns - Constraints management - Temporary and external tables - Views management - TRUNCATE TABLE statement |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Sorting query results - Operator precedence rules - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Limiting rows and substitution variables - Using SELECT statement and column aliases |
| 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 # 38
What is the purpose of a correlated subquery?
Answer: D
NEW QUESTION # 39
What will the following SQL statement output?
SELECT first_name || ' ' || last_name AS full_name FROM employees;
Answer: A
NEW QUESTION # 40
What happens when a unique index is created on a table column?
Answer: B
NEW QUESTION # 41
What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;
Answer: A
NEW QUESTION # 42
What happens when the maximum value of a sequence is reached?
Answer: A
NEW QUESTION # 43
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