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| Section | Objectives |
|---|---|
| Topic 1: Using DDL Statements | - Create and manage views - Create and manage indexes - Create and manage tables - Create and manage sequences - Create and manage constraints |
| Topic 2: Using DML Statements | - Insert rows into a table - Use the MERGE statement - Control transactions - Update rows in a table - Delete rows from a table |
| Topic 3: Using Joins | - Use cross joins - Use self-joins - Use equijoins and non-equijoins - Use outer joins (LEFT, RIGHT, FULL) |
| Topic 4: Using SQL Functions | - Use conversion functions - Use character, number, and date functions in SELECT statements |
| Topic 5: Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Topic 6: Using SELECT Statements | - Use the WHERE clause to restrict rows - Use the FETCH clause to limit rows returned - Use the ORDER BY clause to sort rows - Execute a basic SELECT statement |
| Topic 7: Using Subqueries | - Use multiple-row subqueries - Use correlated subqueries - Use single-row subqueries |
| Topic 8: Controlling User Access | - Differentiate system privileges from object privileges - Create and manage roles - Grant and revoke privileges |
Question 1
Which data dictionary view lists all indexes created by the current user?
A. ALL_INDEXES
B. INDEX_LIST
C. DBA_INDEXES
D. USER_INDEXES
Question 2
Which statement can be used to undo changes made in a transaction?
A. ROLLBACK
B. MERGE
C. SAVEPOINT
D. COMMIT
Question 3
What does the following SQL query do?
SELECT * FROM employees WHERE salary > 5000 ORDER BY department_id;
A. Retrieves all employees with a salary greater than 5000, sorted by salary in ascending order
B. Retrieves all employees, sorted by department ID
C. Retrieves employees with salary less than 5000, sorted by department ID
D. Retrieves all employees with a salary greater than 5000, sorted by department ID in ascending order
Question 4
Which data dictionary view provides information about all the columns in tables accessible to the current user?
A. ALL of the above
B. ALL_TAB_COLUMNS
C. USER_COLUMNS
D. DBA_TAB_COLUMNS
Question 5
Which SQL function can be used to replace NULL values with a specified value?
A. ISNULL
B. NVL
C. REPLACE
D. COALESCE
Solutions:
| Question 1 Answer: D | Question 2 Answer: A | Question 3 Answer: D | Question 4 Answer: A | Question 5 Answer: B |
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