SELECT CONCAT(EXTRACT (MONTH FROM d.transdate),'/',EXTRACT (YEAR FROM d.transdate)) AS date_part,
count(d.id),
max(d.dunning_level)
SELECT CONCAT(EXTRACT (MONTH FROM d.transdate),'/',EXTRACT (YEAR FROM d.transdate)) AS date_part,
count(d.id),
max(d.dunning_level)