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问题描述

是否可以将两个单独的(不相关的)sql查询的结果合并到一个视图中.我正在尝试汇总一些用户数据并计算本月视频的观看次数,以显示在仪表板上.

Is it possible to combine the results of two separate (unrelated) sql queries into a single view. I am trying to total some figures for users and count the views for videos this month to display on a dashboard.

select count(*) from video where monthname(views) = 'May';

select sum(sessions) from user where user_id = 6;

我想创建一个包含这两个结果的视图.

I would like to create a view that combines that contains these two results.

这可能吗?

推荐答案

SELECT t2.total_session,
       t1.watch_count
FROM
  (SELECT 1 AS common_key,
          count(*) AS watch_count
   FROM video
   WHERE monthname(views) = 'May') AS t1
JOIN
  (SELECT 1 AS common_key,
               sum(sessions) AS total_session
   FROM USER
   WHERE user_id = 6) AS t2 ON t1.common_key = t2.common_key;

当然,只有当t1和t2中的输出均为一行时,这才非常有效.

Ofcourse, this will be very efficient only when the output in both t1 and t2 is one row.

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07-16 08:51
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