QUERY PLAN
HashAggregate (cost=386.55..402.03 rows=885 width=48)
Group Key: to_char(arrived_at, 'YYYY-MM'::text)
-> Seq Scan on tbl_implement_records (cost=0.00..377.65 rows=890 width=52)
Filter: ((NOT is_draft) AND (arrived_at >= '2025-01-01 00:00:00+08'::timestamp with time zone) AND (arrived_at <= '2025-12-31 23:59:59+08'::timestamp with time zone))