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| Section | Weight | Objectives |
|---|---|---|
| Controlling User Access | 5% | - System vs object privileges - Granting privileges on tables - Roles creation and privilege assignment |
| DDL for Tables and Relationships | 15% | - Views management - CREATE TABLE statement - Temporary and external tables - TRUNCATE TABLE statement - Table structure, columns, data types - Drop columns, set unused columns - Constraints management |
| Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage synonyms - Create and manage sequences - Create and manage indexes |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Using SET Operators | 5% | - Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators |
| Using Functions | 25% | - ROUND, TRUNC, MOD functions - NVL, NULLIF, COALESCE functions - Group functions and grouping data - Nested functions - Restricting group results - Data type conversion: implicit and explicit - Date arithmetic and date functions - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions |
| Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Retrieving and Sorting Data | 15% | - Operator precedence rules - DEFINE and VERIFY commands - Sorting query results - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword |
| Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
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NEW QUESTION # 88
What will the following query return?
SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;
Answer: C
NEW QUESTION # 89
Which SQL clause can be used in Oracle to limit the number of rows returned?
Answer: B
NEW QUESTION # 90
What happens when the TRUNCATE TABLE statement is executed?
Answer: D
NEW QUESTION # 91
How can you ensure that data is sorted in descending order in a SQL query?
Answer: A
NEW QUESTION # 92
Which function returns the current system date and time in the database session's time zone?
Answer: C
NEW QUESTION # 93
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