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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Controlling User Access | 5% | - Roles creation and privilege assignment - System vs object privileges - Granting privileges on tables |
| Topic 2: Using Subqueries | 5% | - Single-row and multi-row subqueries - Correlated subqueries for update and delete |
| Topic 3: Retrieving and Sorting Data | 15% | - Sorting query results - Using SELECT statement and column aliases - Arithmetic expressions and NULL values - Limiting rows and substitution variables - DEFINE and VERIFY commands - Operator precedence rules - Operators, literals, DISTINCT keyword |
| Topic 4: DDL for Tables and Relationships | 15% | - Temporary and external tables - Views management - TRUNCATE TABLE statement - Drop columns, set unused columns - CREATE TABLE statement - Table structure, columns, data types - Constraints management |
| Topic 5: Using SET Operators | 5% | - Matching SELECT statements - UNION, UNION ALL, INTERSECT, MINUS operators - Using ORDER BY with set operations |
| Topic 6: Relational Database Concepts | 5% | - Relationship between database and SQL - Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components |
| Topic 7: Data Dictionary and Time Zones | 5% | - INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views |
| Topic 8: Displaying Data from Multiple Tables | 10% | - Different types of joins: equijoin, non-equijoin, outer join, self-join - Cartesian products |
| Topic 9: Using Functions | 25% | - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - ROUND, TRUNC, MOD functions - Date arithmetic and date functions - Nested functions - Restricting group results - NVL, NULLIF, COALESCE functions - Character functions for string manipulation - Data type conversion: implicit and explicit - Group functions and grouping data |
| Topic 10: Managing Tables with DML | 5% | - Transaction management and control - Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations |
| Topic 11: Managing Indexes, Synonyms, Sequences | 5% | - Create and manage sequences - Create and manage synonyms - Create and manage indexes |
1. Which type of subquery returns exactly one value?
A) Inline view
B) Multiple-row subquery
C) Scalar subquery
D) Correlated subquery
2. Which SQL clause can be used in Oracle to limit the number of rows returned?
A) DISTINCT
B) FETCH FIRST n ROWS ONLY
C) WHERE
D) GROUP BY
3. Which clause in an UPDATE statement typically uses a subquery to assign values to columns?
A) SET
B) FROM
C) HAVING
D) WHERE
4. What happens if a DELETE statement is executed without a WHERE clause?
A) An error is raised.
B) No rows are deleted.
C) All rows in the table are deleted.
D) Only the first row is deleted.
5. How can you ensure that data is sorted in descending order in a SQL query?
A) Use the DISTINCT keyword
B) Use the ASC keyword
C) Use the DESC keyword
D) Use the ORDER keyword
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: B | Question # 3 Answer: A | Question # 4 Answer: C | Question # 5 Answer: C |
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