Query below lists tables in a database without primary keys.

Query

select tab.table_schema,
       tab.table_name
from v_catalog.tables tab
left join v_catalog.primary_keys pk
          on tab.table_schema = pk.table_schema
          and tab.table_name = pk.table_name
where pk.constraint_id is null
order by tab.table_schema,
         tab.table_name;

Columns

• table_schema - schema name
• table_name - table name

Rows

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

Sample results

Below is a list of tables in Vertica database without primary keys. Is that a lot? Check out here.