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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 |
| Data Dictionary and Time Zones | 5% | - Using data dictionary views - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types |
| Retrieving and Sorting Data | 15% | - Sorting query results - Limiting rows and substitution variables - DEFINE and VERIFY commands - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Operator precedence rules - Operators, literals, DISTINCT keyword |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| DDL for Tables and Relationships | 15% | - CREATE TABLE statement - TRUNCATE TABLE statement - Views management - Temporary and external tables - Drop columns, set unused columns - Constraints management - Table structure, columns, data types |
| 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 - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
| Managing Tables with DML | 5% | - Transaction management and control - INSERT, UPDATE, DELETE operations - Multi-table INSERT and MERGE statements |
| Using Functions | 25% | - Character functions for string manipulation - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Restricting group results - Nested functions - Data type conversion: implicit and explicit - Group functions and grouping data - ROUND, TRUNC, MOD functions |
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問題 #104
Which command can be used to rename a table in Oracle Database?
答案：C
問題 #105
How is the LOCALTIMESTAMP function different from CURRENT_TIMESTAMP?
答案：C
問題 #106
Which SQL clause can be used in Oracle to limit the number of rows returned?
答案：C
問題 #107
Which type of privilege allows a user to perform administrative tasks, such as creating other users?
答案：D
問題 #108
What is the relationship between SQL and a relational database?
答案：D
問題 #109
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