[Solved] What happens if you try to insert a NULL value into a column defined with NOT NULL? — Ans: The database rejects the insert and shows an error | SQL

SQL - Table Constraints

What happens if you try to insert a NULL value into a column defined with NOT NULL?

AThe database inserts the row with a default value

BThe database converts NULL to zero automatically

CThe database rejects the insert and shows an error

DThe database ignores the <code>NOT NULL</code> constraint

Step-by-Step Solution

Solution:

Step 1: Understand the NOT NULL constraint purpose
The NOT NULL constraint prevents NULL values in a column.
Step 2: Behavior on inserting NULL
If you try to insert NULL, the database rejects the operation with an error.
Final Answer:
The database rejects the insert and shows an error -> Option C
Quick Check:
NOT NULL rejects NULL inserts [OK]

Quick Trick: NOT NULL means no empty values allowed [OK]

Common Mistakes:

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What happens if you try to insert a NULL value into a column defined with NOT NULL?