Solution:Step 1: Identify common columns for NATURAL JOINBoth tables share column class_id, so join happens on this column.Step 2: Understand NATURAL JOIN outputIt returns rows where class_id matches, and removes duplicate class_id column from output.Final Answer:Rows where Students.class_id equals

[Solved] Given tables:Students(id, name, class_id)Classes(class_id, name)What will this query return?SELECT * FROM Students NATURAL JOIN Classes; | SQL

SQL - Advanced Joins

Given tables:
Students(id, name, class_id)
Classes(class_id, name)
What will this query return?
SELECT * FROM Students NATURAL JOIN Classes;

ARows where Students.id equals Classes.class_id

BRows where Students.class_id equals Classes.class_id, with duplicate class_id columns removed

CAll combinations of Students and Classes rows

DSyntax error due to ambiguous column names

Step-by-Step Solution

Solution:

Step 1: Identify common columns for NATURAL JOIN
Both tables share column class_id, so join happens on this column.
Step 2: Understand NATURAL JOIN output
It returns rows where class_id matches, and removes duplicate class_id column from output.
Final Answer:
Rows where Students.class_id equals Classes.class_id, with duplicate class_id columns removed -> Option B
Quick Check:
NATURAL JOIN matches on common columns and removes duplicates [OK]

Quick Trick: NATURAL JOIN matches on all same-named columns [OK]

Common Mistakes:

MISTAKES

Assuming NATURAL JOIN returns Cartesian product
Confusing join columns (id vs class_id)
Expecting syntax error due to duplicate column names

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Given tables:

Step 1: Identify common columns for NATURAL JOIN

Step 2: Understand NATURAL JOIN output

Final Answer:

Quick Check:

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