postgre查询表和记录数，查表字段

select relname as TABLE_NAME, reltuples as rowCounts from pg_class where relkind = 'r'
and relnamespace = (select oid from pg_namespace where nspname='public') order by rowCounts desc;

 

select * from information_schema.columns
where table_schema='public' and table_name='表名称 ';