| GroupAggregate (cost=96.90..97.47 rows=19 width=48) |
| Group Key: (to_char(start_at, 'YYYY-MM'::text)) |
| -> Sort (cost=96.90..96.95 rows=19 width=52) |
| Sort Key: (to_char(start_at, 'YYYY-MM'::text)) |
| -> Seq Scan on tbl_pre_sales (cost=0.00..96.50 rows=19 width=52) |
| Filter: ((NOT is_draft) AND (start_at >= '2026-01-01 00:00:00+08'::timestamp with time zone) AND (start_at <= '2026-12-31 23:59:59+08'::timestamp with time zone)) |