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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Retrieving and Sorting Data | 15% | - Limiting rows and substitution variables - Arithmetic expressions and NULL values - Sorting query results - Operator precedence rules - Using SELECT statement and column aliases - Operators, literals, DISTINCT keyword - DEFINE and VERIFY commands |
| Topic 2: Managing Tables with DML | 5% | - Multi-table INSERT and MERGE statements - Transaction management and control - INSERT, UPDATE, DELETE operations |
| Topic 3: Controlling User Access | 5% | - Roles creation and privilege assignment - Granting privileges on tables - System vs object privileges |
| Topic 4: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 5: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage indexes - Create and manage synonyms |
| Topic 6: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Topic 7: Using SET Operators | 5% | - UNION, UNION ALL, INTERSECT, MINUS operators - Matching SELECT statements - Using ORDER BY with set operations |
| Topic 8: DDL for Tables and Relationships | 15% | - Drop columns, set unused columns - TRUNCATE TABLE statement - CREATE TABLE statement - Constraints management - Views management - Table structure, columns, data types - Temporary and external tables |
| Topic 9: Using Functions | 25% | - Date arithmetic and date functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - NVL, NULLIF, COALESCE functions - Nested functions - Character functions for string manipulation - Data type conversion: implicit and explicit - Restricting group results - ROUND, TRUNC, MOD functions - Group functions and grouping data |
| Topic 10: Displaying Data from Multiple Tables | 10% | - Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join |
| Topic 11: Relational Database Concepts | 5% | - Relationship between database and SQL - SQL SELECT clauses and ERD components - Relational database theoretical and physical aspects |
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NEW QUESTION # 44
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;
Answer: B
NEW QUESTION # 45
How can you ensure that data is sorted in descending order in a SQL query?
Answer: C
NEW QUESTION # 46
Which function is used to convert a string to uppercase in SQL?
Answer: C
NEW QUESTION # 47
Which clause is used to allow a user to grant a privilege to others?
Answer: A
NEW QUESTION # 48
Which command would drop an index from a table?
Answer: B
NEW QUESTION # 49
......
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