Query below lists all tables that do not have foreign keys.

See also:

• Tables that are not referenced by the foreign keys,
• Loner Tables - tables without relationships,
  • Summary article of FK queries for SQL Server.

Query

select schema_name(fk_tab.schema_id) as schema_name,
    fk_tab.name as table_name,
    '>- no FKs' foreign_keys
from sys.tables fk_tab
    left outer join sys.foreign_keys fk
        on fk_tab.object_id = fk.parent_object_id
where fk.object_id is null
order by schema_name(fk_tab.schema_id),
    fk_tab.name

Columns

• schema_name - table schema name
• table_name - table name
• foreign_keys - symbol indicating lack of FKs

Rows

• One row represents one table that doesn't have a foreign key
• Scope of rows: all tables in a database that don't have foreign keys (do not refer to other tables)
• Ordered by schema and table name

Sample results

List of tables in AdventureWorks without foreign keys: