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| Section | Weight | Objectives |
|---|---|---|
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Limiting rows and substitution variables - Arithmetic expressions and NULL values - DEFINE and VERIFY commands - Operator precedence rules - Sorting query results - Operators, literals, DISTINCT keyword |
| DDL for Tables and Relationships | 15% | - Temporary and external tables - Drop columns, set unused columns - Constraints management - CREATE TABLE statement - Views management - TRUNCATE TABLE statement - Table structure, columns, data types |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements - Transaction management and control |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Using Functions | 25% | - Restricting group results - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - Nested functions - Data type conversion: implicit and explicit |
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NEW QUESTION # 90
Which statement can be used to undo changes made in a transaction?
Answer: D
NEW QUESTION # 91
What is the relationship between SQL and a relational database?
Answer: A
NEW QUESTION # 92
Which SET operator returns rows from the first query that are not present in the second query?
Answer: B
NEW QUESTION # 93
Which of the following statements creates an ascending sequence starting at 100 and incrementing by 10?
Answer: B
NEW QUESTION # 94
Which SQL function can be used to replace NULL values with a specified value?
Answer: A
NEW QUESTION # 95
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