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| Section | Weight | Objectives |
|---|---|---|
| Using Functions | 25% | - Nested functions - Restricting group results - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Group functions and grouping data - Character functions for string manipulation - Data type conversion: implicit and explicit - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - ROUND, TRUNC, MOD functions |
| Using SET Operators | 5% | - Using ORDER BY with set operations - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| DDL for Tables and Relationships | 15% | - Constraints management - TRUNCATE TABLE statement - Drop columns, set unused columns - Views management - Temporary and external tables - Table structure, columns, data types - CREATE TABLE statement |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Operator precedence rules - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Sorting query results - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - Relationship between database and SQL - SQL SELECT clauses and ERD components |
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NEW QUESTION # 98
What is required for the queries combined by a SET operator to work correctly?
Answer: A
NEW QUESTION # 99
Which of the following is an example of an object privilege?
Answer: B
NEW QUESTION # 100
Which SQL JOIN keyword retrieves all rows from both tables, including those without matches?
Answer: C
NEW QUESTION # 101
Which SQL function can be used to replace NULL values with a specified value?
Answer: B
NEW QUESTION # 102
How does SQL handle NULL values in arithmetic expressions?
Answer: D
NEW QUESTION # 103
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