MySQL uses group by error SQL_MODE = only_full_group_by modifies SQL_MODE in Session in Navicat

Check

 select @@sql_mode;

mysql SQL_MODE results returned by mysql8

Remove the only_full_group_by this SQL_Mode, the operation is as follows:

SET SESSION sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

Then execute the SQL statement will not report an error, this is just modifying SQL_MODE in this connection. When the mysql connection is disconnected, the above setting will be invalid.

UPDATE users,
(
SELECT
  IFNULL( sum( temp_duration ), 0 ) AS total_duration,
  user_id 
FROM
  (
SELECT
  activity_registrations.* 
FROM
  activity_registrations
  LEFT JOIN activities ON activities.id = activity_registrations.activity_id 
WHERE
  area_3 = 441948 
  AND activities.enabled = 1 
  AND checked_out_at IS NOT NULL 
GROUP BY
  join_activity_time,
  activity_registrations.user_id 
ORDER BY
  join_activity_time ASC 
  ) t 
GROUP BY
  user_id 
  ) a 
  SET volunteer_time = total_duration , rank_score = ROUND(total_duration / 3600)
  WHERE
  users.id = a.user_id

The above statement can be successful!

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