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| Section | Weight | Objectives |
|---|---|---|
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP |
| DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - Constraints management - CREATE TABLE statement - Table structure, columns, data types - Temporary and external tables - TRUNCATE TABLE statement - Views management |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage indexes - Create and manage sequences |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Using Functions | 25% | - Date arithmetic and date functions - Data type conversion: implicit and explicit - NVL, NULLIF, COALESCE functions - Restricting group results - Character functions for string manipulation - Nested functions - Group functions and grouping data - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions |
| Retrieving and Sorting Data | 15% | - Using SELECT statement and column aliases - Limiting rows and substitution variables - Operator precedence rules - DEFINE and VERIFY commands - Operators, literals, DISTINCT keyword - Arithmetic expressions and NULL values - Sorting query results |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
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NEW QUESTION # 66
What is the result of the following SQL query?
SELECT COALESCE(NULL, 100, 200) AS result FROM dual;
Answer: D
NEW QUESTION # 67
Which of the following is true about foreign key constraints in SQL?
Answer: C
NEW QUESTION # 68
Which SQL keyword is used to define a substitution variable in a SQL statement?
Answer: A
NEW QUESTION # 69
What is the default order of evaluation when multiple SET operators are used in a query?
Answer: D
NEW QUESTION # 70
What is the purpose of the DBA_OBJECTS data dictionary view?
Answer: D
NEW QUESTION # 71
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