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| Section | Objectives |
|---|---|
| Topic 1: Using DML Statements | - Control transactions - Use the MERGE statement - Delete rows from a table - Insert rows into a table - Update rows in a table |
| Topic 2: Using SELECT Statements | - Use the FETCH clause to limit rows returned - Execute a basic SELECT statement - Use the WHERE clause to restrict rows - Use the ORDER BY clause to sort rows |
| Topic 3: Using Joins | - Use outer joins (LEFT, RIGHT, FULL) - Use cross joins - Use self-joins - Use equijoins and non-equijoins |
| Topic 4: Using Subqueries | - Use single-row subqueries - Use correlated subqueries - Use multiple-row subqueries |
| Topic 5: Using DDL Statements | - Create and manage tables - Create and manage sequences - Create and manage indexes - Create and manage views - Create and manage constraints |
| Topic 6: Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Topic 7: Using SQL Functions | - Use conversion functions - Use character, number, and date functions in SELECT statements |
| Topic 8: Controlling User Access | - Differentiate system privileges from object privileges - Create and manage roles - Grant and revoke privileges |
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NEW QUESTION # 71
What does the following query return?
SELECT ROUND(123.456, 1) AS rounded_value FROM dual;
Answer: B
NEW QUESTION # 72
Which statement can be used to undo changes made in a transaction?
Answer: D
NEW QUESTION # 73
Which SQL statement is used to insert a new row into a table?
Answer: A
NEW QUESTION # 74
What type of join does the following query perform?
SELECT *
FROM employees e, departments d
WHERE e.department_id = d.department_id;
Answer: C
NEW QUESTION # 75
Which data dictionary view provides information about all the columns in tables accessible to the current user?
Answer: A
NEW QUESTION # 76
......
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