Identifying Tables Without Primary Keys in SQL

Identifying Tables Without Primary Keys in SQL

It is quite easy to find out which tables in your database(s) do not have Primary Keys. You can use the following SQL script:

SELECT + N'.' + [table]  FROM sys.tables AS t  INNER JOIN sys.schemas AS s  ON t.[schema_id] = s.[schema_id]  WHERE NOT EXISTS  (    SELECT 1 FROM sys.key_constraints AS k      WHERE k.[type] = N'PK'      AND k.parent_object_id = t.[object_id]  ) 

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist