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| Section | Weight | Objectives |
|---|---|---|
| DDL for Tables and Relationships | 15% | - Views management - CREATE TABLE statement - Temporary and external tables - TRUNCATE TABLE statement - Constraints management - Drop columns, set unused columns - Table structure, columns, data types |
| Managing Indexes, Synonyms, Sequences | 5% | - Create and manage indexes - Create and manage sequences - Create and manage synonyms |
| Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations - Matching SELECT statements |
| Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control |
| Using Subqueries | 5% | - Correlated subqueries for update and delete - Single-row and multi-row subqueries |
| Controlling User Access | 5% | - System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables |
| Relational Database Concepts | 5% | - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL |
| Using Functions | 25% | - Restricting group results - Date arithmetic and date functions - Data type conversion: implicit and explicit - ROUND, TRUNC, MOD functions - Group functions and grouping data - Character functions for string manipulation - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Nested functions |
| Data Dictionary and Time Zones | 5% | - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - INTERVAL data types - Using data dictionary views |
| Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Retrieving and Sorting Data | 15% | - DEFINE and VERIFY commands - Sorting query results - Limiting rows and substitution variables - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - Operator precedence rules - Arithmetic expressions and NULL values |
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NEW QUESTION # 48
What does the following command do?
GRANT CREATE SESSION TO user_name;
Answer: C
NEW QUESTION # 49
Which operator can be used in a multiple-row subquery to match a single value to a list of values?
Answer: D
NEW QUESTION # 50
Which SQL clause can be used in Oracle to limit the number of rows returned?
Answer: D
NEW QUESTION # 51
What will the following query return?
SELECT TO_CHAR(SYSDATE, 'DD-MM-YYYY') AS formatted_date FROM dual;
Answer: B
NEW QUESTION # 52
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: A
NEW QUESTION # 53
......
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