Solution:Step 1: Check column names in ON conditionThe query uses d.ID but Departments table has DeptID, not ID.Step 2: Understand SQL error on invalid columnReferencing a non-existent column causes a syntax or runtime error.Final Answer:The query will cause a syntax error due to wrong column name.

[Solved] Consider this query:SELECT e.Name, d.DeptName FROM Employees e INNER JOIN Departments d ON e.DeptID = d.ID;Given Departments has column DeptID but no ID column, what is the issue? | SQL

SQL - INNER JOIN

Consider this query:

SELECT e.Name, d.DeptName FROM Employees e INNER JOIN Departments d ON e.DeptID = d.ID;

Given Departments has column DeptID but no ID column, what is the issue?

AThe query will join on wrong columns but still return rows.

BThe query will run but return no rows.

CThe query will cause a syntax error due to wrong column name.

DThe query will join correctly because aliases fix column names.

Step-by-Step Solution

Solution:

Step 1: Check column names in ON condition
The query uses d.ID but Departments table has DeptID, not ID.
Step 2: Understand SQL error on invalid column
Referencing a non-existent column causes a syntax or runtime error.
Final Answer:
The query will cause a syntax error due to wrong column name. -> Option C
Quick Check:
Wrong column in ON causes error [OK]

Quick Trick: Verify column names in ON condition to avoid errors [OK]

Common Mistakes:

MISTAKES

Assuming aliases rename columns automatically
Using wrong column names in ON clause
Expecting empty result instead of error

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Consider this query:

Step 1: Check column names in ON condition

Step 2: Understand SQL error on invalid column

Final Answer:

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