data-konzept

Query below lists tables in a database without primary keys.

'select schema_name(tab.schema_id) as [schema_name],
    tab.[name] as table_name
from sys.tables tab
    left outer join sys.indexes pk
        on tab.object_id = pk.object_id
        and pk.is_primary_key = 1
where pk.object_id is null
order by schema_name(tab.schema_id),
    tab.[name]'...

https://dataedo.com/kb/query/sql-server/find-tables-without-primary-keys