From c434145fa16e27d165d1d80e9b4031b9bc5e737f Mon Sep 17 00:00:00 2001 From: Fortern Date: Wed, 28 Jan 2026 05:59:46 +0800 Subject: [PATCH] prism --- PostgreSQL/prism/prism.sql | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/PostgreSQL/prism/prism.sql b/PostgreSQL/prism/prism.sql index 1dcdef3..76e9a12 100644 --- a/PostgreSQL/prism/prism.sql +++ b/PostgreSQL/prism/prism.sql @@ -6,8 +6,13 @@ from activities; select to_timestamp(min(timestamp)) from activities; +-- 最大与最小id +select min(activity_id), max(activity_id) +from activities; + -- 数据总量 -select max(activity_id) - min(activity_id) + 1 from activities; +select max(activity_id) - min(activity_id) + 1 +from activities; -- 1天内的数据，按action分组排序 select b.action_id, b.action, count(b.action_id)