php - SUM IF 条件真回波描述

Question

细节：

lo means layout
lo_act_id ( activity id ), lo_time ( time spent ) , up_time and down_time , lo_description , lo_client_id

如果活动 id < 到 99 表示正常运行时间

如果活动 id > 到 99 意味着停机但我已经停机，我想看看它的注释/原因。

这是我使用它的查询很好，但我不知道如何获取和显示lo_description

SELECT * , 
  SUM( IF( `lo_act_id` > 99 , lo_time , 0 )) AS down_time,
  SUM( IF( `lo_act_id` < 99 , lo_time , 0 ,lo_desc )) AS up_time
FROM tbl_Layout
LEFT  JOIN tbl_Client ON lo_client_id=client_code
GROUP BY lo_client_id

这就是我得到的

Client   Spent Time  Downtime
1        216           3 
20       250           0 
16       10           16 
35       60            0
60       30            0

这就是我想要得到的：

Client    Spend Time    Downtime    Note
1         216           3           Replace Network Card
20        250           0     
16        10            16          Replace Main Board
                                    Monthly Maintenance
                                    Hurricane affect facilities
35        60            0
60        30            0

Answer 1

用于CAST去掉“分钟”和“分钟”（假设该字段始终包含分钟，而不是秒或小时）。

用于GROUP_CONCAT将描述粘在一起。

SELECT
  tbl_Client.*,
  SUM(IF(`lo_act_id` > 99, CAST(lo_time AS UNSIGNED), 0)) AS down_time,
  SUM(IF(`lo_act_id` < 99, CAST(lo_time AS UNSIGNED), 0)) AS up_time,
  GROUP_CONCAT(IF(`lo_act_id` > 99, lo_description, NULL) SEPARATOR "\n") AS note
FROM tbl_Layout
LEFT JOIN tbl_Client ON lo_client_id=client_code
GROUP BY lo_client_id