select i.rdb$relation_name,cast (1/i.rdb$statistics as integer) as RCOUNT
from rdb$relation_constraints rc
inner join  rdb$indices i on (rc.rdb$relation_name=i.rdb$relation_name
                              and rc.rdb$index_name=i.rdb$index_name
                              and (rc.rdb$index_name is not null)
                              and TRIM(UPPER(rc.rdb$constraint_type))='PRIMARY KEY'
                              and i.rdb$statistics>0
                              )