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Oracle 1Z1-171 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Using Joins | - Use cross joins - Use outer joins (LEFT, RIGHT, FULL) - Use equijoins and non-equijoins - Use self-joins |
| Topic 2: Using SELECT Statements | - Use the ORDER BY clause to sort rows - Use the WHERE clause to restrict rows - Execute a basic SELECT statement - Use the FETCH clause to limit rows returned |
| Topic 3: Controlling User Access | - Create and manage roles - Grant and revoke privileges - Differentiate system privileges from object privileges |
| Topic 4: Using DDL Statements | - Create and manage views - Create and manage tables - Create and manage indexes - Create and manage sequences - Create and manage constraints |
| Topic 5: Using SQL Functions | - Use conversion functions - Use character, number, and date functions in SELECT statements |
| Topic 6: Using Subqueries | - Use single-row subqueries - Use multiple-row subqueries - Use correlated subqueries |
| Topic 7: Using Set Operators | - Use UNION, UNION ALL, INTERSECT, and MINUS operators |
| Topic 8: Using DML Statements | - Control transactions - Delete rows from a table - Insert rows into a table - Update rows in a table - Use the MERGE statement |
Oracle Database 23ai SQL Associate Sample Questions:
Question 1
What does the following query return?
SELECT employee_id
FROM employees
WHERE department_id IN (SELECT department_id FROM departments WHERE location_id = 1000);
A. Departments located in location ID 1000
B. Employees working in location ID 1000
C. Employees with no department
D. Employees with salaries greater than 1000
Question 2
Which of the following SET operators combines results from two queries and removes duplicates?
A. MINUS
B. INTERSECT
C. UNION
D. UNION ALL
Question 3
What is the difference between UNION and UNION ALL?
A. UNION includes all rows, while UNION ALL removes duplicates.
B. UNION removes duplicates, while UNION ALL includes all rows, including duplicates.
C. UNION combines columns, while UNION ALL combines rows.
D. UNION works with subqueries, while UNION ALL does not.
Question 4
What does a Cartesian product in SQL result from?
A. An OUTER JOIN with NULL values
B. A NATURAL JOIN without specifying join conditions
C. An INNER JOIN without specifying join conditions
Question 5
What is a sequence in Oracle Database?
A. A type of index used for sorting rows
B. A predefined set of SQL queries executed in order
C. A database object that generates a series of unique numeric values
D. A list of numbers stored in a table
Solutions:
| Question 1 Answer: B | Question 2 Answer: C | Question 3 Answer: B | Question 4 Answer: C | Question 5 Answer: C |
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