php - 在 mysql 中使用除法时遇到问题

Question

我想获得设计总视图/图片数量的流行度：这是代码：

$users = DB::query("SELECT * ,
  COUNT(p.id) as numPics,
  SUM(p.views) as totalViews
  COUNT(p.views)/SUM(p.id) as popularity
FROM
  images p 
INNER JOIN
  users u
ON
  p.user_id = u.id
 WHERE 
 p.created_at >= \"$current_month\"
GROUP BY p.user_id
ORDER BY popularity DESC LIMIT 10");

我收到此错误：语法错误或访问冲突：1064 您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册，以了解在 'COUNT(p.views)/SUM(p.id) 附近使用的正确语法作为流行度

Answer 1

您在以下内容后缺少逗号：

SUM(p.views) as totalViews

Answer 2

$users = DB::query("SELECT * ,
  COUNT(p.id) as numPics,
  SUM(p.views) as totalViews , 
  COUNT(p.views)/SUM(p.id) as popularity
FROM
  images p 
INNER JOIN
  users u
ON
  p.user_id = u.id
 WHERE 
 p.created_at >= '$current_month'
GROUP BY p.user_id
ORDER BY popularity DESC LIMIT 10");