Find tables without primary keys (PKs)

The query below lists tables in a database without primary keys.

Query

select schema_name(tab.schema_id) as [schema_name],
    tab.[name] as table_name
from sys.tables as tab
    left outer join sys.indexes as 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]

Columns

  • schema_name - name of the schema
  • table_name - name of the table

Rows

  • One row: represents one table in a database
  • Scope of rows: all tables without primary keys in a database
  • Ordered by: schema, table name

Sample results

Below is a list of tables without primary keys.

Is that a lot? Check out here.

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