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Identifying Tables Without Primary Keys in SQL

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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 s.name + N'.' + t.name [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]  )

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