List tables with most foreign keys in Vertica database

Query below allow to get number of references from tables.

See also:

Query

select table_schema || '.' || table_name
            as table,
       count(*) as foreign_keys,
       count(distinct reference_table_schema ||'.'|| reference_table_name)
            as referenced_tables
from v_catalog.foreign_keys
group by table_schema,
         table_name
order by count(*) desc;

Columns

  • table_name - schema name followed with table name
  • foreign_keys - number of FKs in a table
  • referenced_tables - count of referenced tables. (Many foreign keys can reference to the same table)

Rows

  • One row represents one table
  • Scope of rows: all tables which are referencing to tables
  • Ordered by count of foreign keys descending

Sample results

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