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| Section | Weight | Objectives |
|---|---|---|
| Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| 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% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
| DDL for Tables and Relationships | 15% | - Constraints management - TRUNCATE TABLE statement - Temporary and external tables - Table structure, columns, data types - CREATE TABLE statement - Views management - Drop columns, set unused columns |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Using Functions | 25% | - Character functions for string manipulation - Group functions and grouping data - Nested functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Date arithmetic and date functions - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions |
| Retrieving and Sorting Data | 15% | - Sorting query results - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Limiting rows and substitution variables - DEFINE and VERIFY commands - Operator precedence rules - Arithmetic expressions and NULL values |
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NEW QUESTION # 38
Which type of subquery returns exactly one value?
Answer: D
NEW QUESTION # 39
How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?
Answer: B
NEW QUESTION # 40
What does the INTERSECT operator do in SQL?
Answer: B
NEW QUESTION # 41
Which SQL function converts a string representation of a date into a date data type?
Answer: B
NEW QUESTION # 42
Which of the following ensures that a relational database enforces data integrity?
Answer: B
NEW QUESTION # 43
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