Oracle Practice 1Z0-171 Test: Oracle Database 23ai SQL Associate - Lead2PassExam Purchasing Safely and Easily

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Oracle 1Z0-171 Exam Syllabus Topics:

Section	Objectives
Using SQL Functions	- Use character, number, and date functions in SELECT statements - Use conversion functions
Using Set Operators	- Use UNION, UNION ALL, INTERSECT, and MINUS operators
Using Joins	- Use self-joins - Use equijoins and non-equijoins - Use cross joins - Use outer joins (LEFT, RIGHT, FULL)
Using SELECT Statements	- Execute a basic SELECT statement - Use the FETCH clause to limit rows returned - Use the ORDER BY clause to sort rows - Use the WHERE clause to restrict rows
Controlling User Access	- Differentiate system privileges from object privileges - Grant and revoke privileges - Create and manage roles
Using DML Statements	- Update rows in a table - Use the MERGE statement - Insert rows into a table - Control transactions - Delete rows from a table
Using DDL Statements	- Create and manage views - Create and manage constraints - Create and manage sequences - Create and manage tables - Create and manage indexes
Using Subqueries	- Use correlated subqueries - Use single-row subqueries - Use multiple-row subqueries

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Oracle Database 23ai SQL Associate Sample Questions (Q13-Q18):

NEW QUESTION # 13
What will the following query do?
DELETE FROM employees
WHERE department_id = 20;

A. Delete all rows where department_id is 20
B. Delete the department_id column in the employees table
C. Delete all rows in the employees table
D. Raise an error because DELETE cannot use a WHERE clause

Answer: A

NEW QUESTION # 14
What does the INTERSECT operator do in SQL?

A. Combines rows from two queries and includes all duplicates
B. Combines all rows from two queries without any conditions
C. Returns rows that are present in both queries
D. Returns rows from the first query that are not present in the second query

Answer: C

NEW QUESTION # 15
What does the EXISTS operator check in a subquery?

A. If the subquery references the outer query
B. If the subquery contains only unique values
C. If the subquery returns any rows
D. If the subquery returns a specific number of rows

Answer: C

NEW QUESTION # 16
How does SQL handle NULL values in arithmetic expressions?

A. Treats them as the largest possible number
B. Produces a NULL result
C. Treats them as zero
D. Produces an error

Answer: B

NEW QUESTION # 17
What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;

A. Lists employees and their corresponding managers
B. Lists employees without departments
C. Lists employees who are managers
D. Lists employees who are not managers

Answer: A

NEW QUESTION # 18
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