Is it possible to update a primary key to null in SQL

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I have a table with a primary key in SQL Server 2008.
When I try to update the primary key to null, it is happening, Is this a feature of SQL that you can update the primary key to null?

Posted 21-Aug-12 21:43pm

lebna thomas

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5 solutions

Solution 3

Thanks!
I think I got where I was going wrong. Some how through the UI, an empty string was getting inserted into the primary column . So, it was not actually a null value.

Posted 21-Aug-12 22:03pm

lebna thomas

Solution 4

No you cannot make Primary key to a Null value

Posted 21-Aug-12 22:13pm

Hesha

Solution 5

No primary key always have some value... it never to be null...

Posted 21-Aug-12 22:23pm

prashant patil 4987

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Wendelius · Accepted Answer · 2012-08-21T21:57:00

Solution 1

To simply put it, primary key can never be null.

If you need a key that can sometimes be null, consider using a unique key.

References:
- Primary key[^]
- Unique key[^]

Posted 21-Aug-12 21:57pm

Wendelius

Updated 21-Aug-12 22:00pm

v2

Sunil Kumar Pandab · Accepted Answer · 2012-08-21T21:58:00

Solution 2

Absolutely not my dear...

Primary key column always keeps data NOT NULL and UNIQUE.

Posted 21-Aug-12 21:58pm

Sunil Kumar Pandab