If you want to get an overview on how many rows tables in your database hold one way is to count them by row intervals. This query returns number of tables by the number of their rows grouped into predefined intervals.

Query

select row_count,
       count(table_name) as tables
from (
      select tab.table_name,
             tab.table_schema,
             case when tinf.tbl_rows  > 1000000000 then '1b rows and more'
                  when tinf.tbl_rows  > 1000000 then '1m - 1b rows'
                  when tinf.tbl_rows  > 1000 then '1k - 1m rows'
                  when tinf.tbl_rows  > 100 then '100 - 1k rows'
                  when tinf.tbl_rows  > 10 then '10 - 100 rows'
                  else  '0 - 10 rows' end as row_count,
             tinf.tbl_rows as sort
      from svv_tables tab
      left join svv_table_info tinf
                on tab.table_schema = tinf.schema
                and tab.table_name = tinf.table
                and tab.table_schema not in ('pg_catalog', 'information_schema')
) as tables_rows_interval
group by row_count
order by max(sort);

Columns

• row_count - predefined row count intervals:
  • 0 - 10 rows
  • 10 - 100 rows
  • 100 - 1k rows
  • 1k - 1m rows
  • 1m - 1b rows
  • 1b rows and more
• tables - number of tables whose row count falls in that interval

Rows

• One row: represents one interval
• Scope of rows: all row count intervals that appear in the database
• Ordered by: from the smallest table row count to the largest

Sample results