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SQL SERVER – Primary Key Must Not Contain NULL – Primary Key are NOT NULL

Pinal Dave
SQL, SQL Server, SQL Tips and Tricks
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While reviewing the search engine log for this blog I found lots of search regarding Nullable Primary Key. It is not possible. This post is especially to clear the Not Nullable Primary Key Property. The Allow Nulls property can’t be set on a column that is part of the primary key. All columns that are part of a table’s a primary key must contain aggregate unique values other than NULL.

Reference : Pinal Dave (https://darkslategrey-bat-805937.hostingersite.com) , BOL

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Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 22 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.

Pinal has authored 14 SQL Server database books and 100 Pluralsight courses. To freely share his knowledge and help others build their expertise, Pinal has also written more than 5,800 database tech articles on his blog at https://darkslategrey-bat-805937.hostingersite.com.

Pinal is an experienced and dedicated professional with a deep commitment to flawless customer service. If you need help with any SQL Server Performance Tuning Issues, please feel free to reach out at pinal@sqlauthority.com.

Pinal is also a CrossFit Level 1 Trainer (CF-L1) and CrossFit Level 2 Trainer (CF-L2).

Nupur Dave is a social media enthusiast and an independent consultant. She primarily focuses on the database domain, helping clients build short and long-term multi-channel campaigns to drive leads for their sales pipeline.

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