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| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - TRUNCATE TABLE statement - Table structure, columns, data types - Drop columns, set unused columns - Views management - Temporary and external tables - Constraints management - CREATE TABLE statement |
| Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands - Sorting query results - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operator precedence rules |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Using Functions | 25% | - Nested functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Character functions for string manipulation - Group functions and grouping data - ROUND, TRUNC, MOD functions - Data type conversion: implicit and explicit - Restricting group results - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions |
| Managing Tables with DML | 5% | - INSERT, UPDATE, DELETE operations - Transaction management and control - Multi-table INSERT and MERGE statements |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Controlling User Access | 5% | - Granting privileges on tables - System vs object privileges - Roles creation and privilege assignment |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views - INTERVAL data types |
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NEW QUESTION # 83
Which SQLPlus command displays defined substitution variable values?
Answer: D
NEW QUESTION # 84
Which data dictionary view provides information about all the columns in tables accessible to the current user?
Answer: D
NEW QUESTION # 85
Which command would drop an index from a table?
Answer: D
NEW QUESTION # 86
What is a role in Oracle Database?
Answer: B
NEW QUESTION # 87
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;
Answer: C
NEW QUESTION # 88
......
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