/* Size of the tables (excluding indexes), descending by size */

SELECT c.relname AS name,

pg_size_pretty(pg_table_size(c.oid)) AS size

FROM pg_class c LEFT JOIN pg_namespace n ON (n.oid = c.relnamespace) WHERE n.nspname NOT IN ('pg_catalog', 'information_schema') AND n.nspname !~ '^pg_toast' AND c.relkind IN ('r', 'm') ORDER BY pg_table_size(c.oid) DESC;