Rename one of the name columns and use an explicit JOIN with ON clause

Remove the category_id column from one table

Solution:Step 1: Identify the cause of unexpected resultsBoth tables have a column named name. NATURAL JOIN joins on all same-named columns, so it joins on category_id and name, causing unintended matches.Step 2: Fix by renaming and using explicit joinRenaming one name column (e.g., to category_name

[Solved] You have two tables:Products(product_id, name, category_id)Categories(category_id, name)Using NATURAL JOIN between these tables causes unexpected results. What is the best way to fix this? | SQL

SQL - Advanced Joins

You have two tables:
Products(product_id, name, category_id)
Categories(category_id, name)
Using NATURAL JOIN between these tables causes unexpected results. What is the best way to fix this?

ARemove the <code>category_id</code> column from one table

BUse NATURAL JOIN anyway and ignore the extra matches

CUse CROSS JOIN to avoid matching columns

DRename one of the <code>name</code> columns and use an explicit JOIN with ON clause

Step-by-Step Solution

Solution:

Step 1: Identify the cause of unexpected results
Both tables have a column named name. NATURAL JOIN joins on all same-named columns, so it joins on category_id and name, causing unintended matches.
Step 2: Fix by renaming and using explicit join
Renaming one name column (e.g., to category_name) and using an explicit JOIN with ON clause on category_id avoids accidental joins on name.
Final Answer:
Rename one of the name columns and use an explicit JOIN with ON clause -> Option D
Quick Check:
Rename columns + explicit ON join avoids NATURAL JOIN risks [OK]

Quick Trick: Rename columns and use explicit ON join to avoid natural join risks [OK]

Common Mistakes:

MISTAKES

Ignoring column name conflicts with NATURAL JOIN
Removing important columns instead of renaming
Using CROSS JOIN which returns all combinations

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You have two tables:

Step 1: Identify the cause of unexpected results

Step 2: Fix by renaming and using explicit join

Final Answer:

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