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Oracle 1Z0-171 Exam Syllabus Topics:

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

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Oracle Database 23ai SQL Associate Sample Questions (Q86-Q91):

NEW QUESTION # 86
What does the following SQL statement do?
SELECT e.employee_id, d.department_name
FROM employees e
JOIN departments d ON e.department_id = d.department_id;

A. Retrieves employees and departments with matching department_id
B. Retrieves only employees without departments
C. Retrieves all employees and their departments
D. Retrieves only departments with no employees

Answer: A

NEW QUESTION # 87
What does the following SQL statement do?
ALTER TABLE employees DROP COLUMN salary;

A. Removes duplicate rows from the employees table
B. Deletes the employees table
C. Sets the salary column to NULL for all rows
D. Drops the salary column from the employees table

Answer: D

NEW QUESTION # 88
Which of the following ensures that a relational database enforces data integrity?

A. Indexes on all columns
B. Constraints such as primary keys, foreign keys, and unique constraints
C. Redundant data storage
D. Hierarchical data organization

Answer: B

NEW QUESTION # 89
The column data type is converted to a primary key.

A. CREATE SYNONYM
B. CREATE ALIAS
C. CREATE INDEX
D. CREATE SEQUENCE

Answer: A

NEW QUESTION # 90
What happens if a DELETE statement is executed without a WHERE clause?

A. An error is raised.
B. No rows are deleted.
C. All rows in the table are deleted.
D. Only the first row is deleted.

Answer: C

NEW QUESTION # 91
......

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