Solution:Step 1: Understand INNER JOIN effect on these tablesINNER JOIN returns rows where Employees.dept_id matches Departments.dept_id, so only employees with matching departments appear.Step 2: Analyze optionsAll employees with their department names where dept_id matches correctly describes this

[Solved] Given tables:Employees(id, name, dept_id)Departments(dept_id, dept_name)What will this query return?SELECT Employees.name, Departments.dept_name FROM Employees INNER JOIN Departments ON Employees.... | SQL

SQL - INNER JOIN

Given tables:
Employees(id, name, dept_id)
Departments(dept_id, dept_name)
What will this query return?

SELECT Employees.name, Departments.dept_name FROM Employees INNER JOIN Departments ON Employees.dept_id = Departments.dept_id;

AAll employees with their department names where dept_id matches

BAll employees including those without a department

CAll departments including those without employees

DAn error because dept_id is ambiguous

Step-by-Step Solution

Solution:

Step 1: Understand INNER JOIN effect on these tables
INNER JOIN returns rows where Employees.dept_id matches Departments.dept_id, so only employees with matching departments appear.
Step 2: Analyze options
All employees with their department names where dept_id matches correctly describes this. All employees including those without a department would be LEFT JOIN. All departments including those without employees would be RIGHT JOIN. An error because dept_id is ambiguous is incorrect because dept_id is qualified properly.
Final Answer:
All employees with their department names where dept_id matches -> Option A
Quick Check:
INNER JOIN returns matching rows only [OK]

Quick Trick: INNER JOIN returns only rows with matching keys in both tables [OK]

Common Mistakes:

MISTAKES

Thinking INNER JOIN returns unmatched rows
Assuming ambiguous column error without qualification
Confusing INNER JOIN with LEFT or RIGHT JOIN

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Given tables:

Step 1: Understand INNER JOIN effect on these tables

Step 2: Analyze options

Final Answer:

Quick Check:

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