合并

etl_billiards/docs/table_2025-12-19/助教_附加课时长排行_2025年10-12月.md

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+# 2025年10-12月 助教附加课(超休)时长排行榜
+## 思考过程
+按月汇总助教附加课时长，并用 dense_rank 做排名。
+
+## 查询说明
+口径：order_assistant_type=2；时长=income_seconds/3600（小时）。
+
+## SQL
+
+### 附加课时长（助教+月份汇总）
+```sql
+with raw as (
+  select
+    asl.nickname as assistant,
+    case when asl.start_use_time >= '2025-10-01 00:00:00+08'::timestamptz and asl.start_use_time < '2025-11-01 00:00:00+08'::timestamptz then '2025-10' when asl.start_use_time >= '2025-11-01 00:00:00+08'::timestamptz and asl.start_use_time < '2025-12-01 00:00:00+08'::timestamptz then '2025-11' when asl.start_use_time >= '2025-12-01 00:00:00+08'::timestamptz and asl.start_use_time < '2026-01-01 00:00:00+08'::timestamptz then '2025-12' else null end as month_key,
+    asl.income_seconds
+  from billiards_dwd.dwd_assistant_service_log asl
+  where asl.site_id = %(site_id)s
+    and coalesce(asl.is_delete,0)=0
+    and asl.order_assistant_type=2
+    and asl.start_use_time >= %(window_start)s::timestamptz
+    and asl.start_use_time <  %(window_end)s::timestamptz
+)
+select
+  assistant,
+  month_key,
+  sum(income_seconds)/3600.0 as hours
+from raw
+where month_key is not null
+group by assistant, month_key;
+```