Pass Guaranteed Quiz Oracle - 1Z0-171 - Oracle Database 23ai SQL Associate Authoritative Pass Guide

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Oracle 1Z0-171 Exam Syllabus Topics:

Section	Objectives
Relational Database Concepts	- Database fundamentals and relational model 1. Tables, rows, columns, and keys 2. Entity relationships and normalization basics
Retrieving Data Using SQL	- Joins and Subqueries 1. Inner and outer joins 2. Correlated and non-correlated subqueries - SELECT statements 1. Filtering with WHERE clause 2. Column selection and expressions 3. Sorting results with ORDER BY
Data Manipulation Language (DML)	- Insert, Update, Delete operations 1. Transaction control (COMMIT, ROLLBACK) 2. Data integrity considerations
Data Definition Language (DDL)	- Schema objects 1. Views and indexes 2. Tables and constraints
Advanced SQL Features	- Aggregations and grouping 1. Aggregate functions 2. GROUP BY and HAVING - Set operators and functions 1. Single-row and group functions 2. UNION, INTERSECT, MINUS

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Oracle Database 23ai SQL Associate Sample Questions (Q28-Q33):

NEW QUESTION # 28
Which Oracle SQL function returns the current date and time, including time zone information?

A. CURRENT_DATE
B. CURRENT_TIMESTAMP
C. SYSDATE
D. NOW

Answer: B

NEW QUESTION # 29
What happens when a temporary table is created in Oracle Database?

A. It cannot have any constraints.
B. It is stored in external files.
C. It is created for the duration of a user session or transaction.
D. It is permanently stored in the database.

Answer: C

NEW QUESTION # 30
What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;

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

Answer: B

NEW QUESTION # 31
What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;

A. Returns only the employees with salaries and bonuses
B. Returns only employees with duplicate employee IDs in both tables
C. Combines all employee IDs, salaries, and bonuses, including duplicates
D. Combines the salaries and bonuses for employees, removing duplicates

Answer: C

NEW QUESTION # 32
Which clause in a SQL SELECT statement is used to define the columns to be retrieved?

A. GROUP BY
B. WHERE
C. FROM
D. SELECT

Answer: D

NEW QUESTION # 33
......

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