Exam Topics 1Z0-171 Pdf & Valid 1Z0-171 Exam Prep

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Oracle 1Z0-171 Exam Syllabus Topics:

Section	Objectives
Topic 1: Advanced SQL Features	- Set operators and functions 1. Single-row and group functions 2. UNION, INTERSECT, MINUS - Aggregations and grouping 1. Aggregate functions 2. GROUP BY and HAVING
Topic 2: Retrieving Data Using SQL	- SELECT statements 1. Column selection and expressions 2. Filtering with WHERE clause 3. Sorting results with ORDER BY - Joins and Subqueries 1. Inner and outer joins 2. Correlated and non-correlated subqueries
Topic 3: Relational Database Concepts	- Database fundamentals and relational model 1. Entity relationships and normalization basics 2. Tables, rows, columns, and keys
Topic 4: Data Definition Language (DDL)	- Schema objects 1. Tables and constraints 2. Views and indexes
Topic 5: Data Manipulation Language (DML)	- Insert, Update, Delete operations 1. Transaction control (COMMIT, ROLLBACK) 2. Data integrity considerations

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Oracle Database 23ai SQL Associate Sample Questions (Q14-Q19):

NEW QUESTION # 14
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 # 15
What does the COMMIT statement do in SQL?

A. Saves all pending changes to the database permanently
B. Discards all pending changes in the transaction
C. Rolls back changes to a previous state
D. Begins a new transaction

Answer: A

NEW QUESTION # 16
Which operator can be used in a multiple-row subquery to match a single value to a list of values?

A. NOT NULL
B. IN
C. =
D. EXISTS

Answer: B

NEW QUESTION # 17
What is a SELF JOIN in SQL?

A. A join of a table with itself
B. A join that does not require a WHERE clause
C. A join used for Cartesian products
D. A join between tables with identical structures

Answer: A

NEW QUESTION # 18
What is the purpose of a correlated subquery?

A. A subquery that can be used only with aggregate functions
B. A subquery that references columns from the outer query
C. A subquery that depends on the result of another subquery
D. A subquery that combines data from multiple tables

Answer: B

NEW QUESTION # 19
......

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