Question

如何使用MySQL的开始时间，结束时间和每小时价格来计算每小时的价格？

这是我此时的要求：

$query = "SELECT
        requests.id as request_id,
        requests.request_type as request_type,
        service_types.name as service_type,
        requests.status,
        requests.provider_status,
        requests.amount,
        requests.s_latitude as latitude,
        requests.s_longitude as longitude,
        requests.confirmed_provider as provider_id,
        requests.user_accepted,
        requests.provider_accepted,
        providers.id as provider_id,
        providers.first_name as provider_first_name,
        providers.last_name as provider_last_name,
        providers.picture as provider_picture,
        AVG(provider_ratings.rating) as rating,
        provider_services.price as price_per_hour,
        requests.start_time,
        TIMEDIFF(now(),requests.start_time) as time_elapsed_since_start,
        TIMEDIFF(requests.end_time,requests.start_time) as total_request_time,
        (TIMEDIFF(requests.end_time,requests.start_time) * provider_services.price) / 10000 as price_before_tax,
        provider_services.price / TIMEDIFF(requests.end_time,requests.start_time) as price_with_tax
      FROM
        requests
      LEFT JOIN
        providers ON providers.id = requests.confirmed_provider
      LEFT JOIN
        provider_ratings ON requests.confirmed_provider = provider_ratings.provider_id
      LEFT JOIN
        provider_services ON providers.id = provider_services.provider_id AND provider_services.service_type_id = requests.request_type
      LEFT JOIN
        service_types ON requests.request_type = service_types.id
      WHERE
        (requests.user_id = $request->id AND requests.provider_status != 1 AND requests.status != 2 AND requests.status != 6 AND requests.user_accepted = 1 AND requests.provider_accepted = 1) OR
        (requests.user_id = $request->id AND requests.provider_status != 0 AND requests.status != 0 AND requests.status != 6 AND requests.user_accepted = 1 AND requests.provider_accepted = 1)
      GROUP BY
        requests.id";

此时计算价格：

(TIMEDIFF(requests.end_time,requests.start_time) * provider_services.price) / 10000 as price_before_tax,

只有当请求需要整整几个小时时才能正常运行，例如：

start_time：2017-11-21 14:21:16

end_time：2017-11-21 16:21:16

在这种情况下，价格很好地计算，你可以看到：

但是如果我将end_time更改为 2017-11-21 16:51:16 ，那么计算出的金额就像你在那里看到的那样疯狂：

Answer 1

基于分钟计算时，计算会更加安全。像这样。

查询start_time：2017-11-21 14:21:16 end_time：2017-11-21 16:21:16

SELECT TIMESTAMPDIFF(MINUTE, '2017-11-21 14:21:16', '2017-11-21 16:21:16') * (30 / 60)

<强>结果

TIMESTAMPDIFF(MINUTE, '2017-11-21 14:21:16', '2017-11-21 16:21:16') * (30 / 60)  
---------------------------------------------------------------------------------
60.0000

查询start_time：2017-11-21 14:21:16 end_time：2017-11-21 16:51:16

 SELECT TIMESTAMPDIFF(MINUTE, '2017-11-21 14:21:16', '2017-11-21 16:51:16') * (30 / 60)

<强>结果

TIMESTAMPDIFF(MINUTE, '2017-11-21 14:21:16', '2017-11-21 16:51:16') * (30 / 60)  
---------------------------------------------------------------------------------
75.0000

Answer 2

以下是我解决问题的方法：

$query = "SELECT
    requests.id as request_id,
    requests.request_type as request_type,
    service_types.name as service_type,
    requests.status,
    requests.provider_status,
    requests.amount,
    requests.s_latitude as latitude,
    requests.s_longitude as longitude,
    requests.confirmed_provider as provider_id,
    requests.user_accepted,
    requests.provider_accepted,
    providers.id as provider_id,
    providers.first_name as provider_first_name,
    providers.last_name as provider_last_name,
    providers.picture as provider_picture,
    AVG(provider_ratings.rating) as rating,
    provider_services.price as price_per_hour,
    requests.start_time,
    requests.end_time,
    TIMEDIFF(requests.end_time,requests.start_time) as total_request_time,
    TIME_TO_SEC(TIMEDIFF(requests.end_time,requests.start_time))/60 as total_request_time_in_minutes,
    TIMEDIFF(now(),requests.start_time) as time_elapsed_since_start,
    (TIME_TO_SEC(now()) - TIME_TO_SEC(requests.start_time))/60 as time_elapsed_since_start_in_minutes,
    TIME_TO_SEC(TIMEDIFF(now(),requests.start_time))/60 as time_elapsed_since_start_in_minutes,
    IF((TIME_TO_SEC(TIMEDIFF(requests.end_time,requests.start_time))/60) > 15 ,(TIME_TO_SEC(TIMEDIFF(requests.end_time,requests.start_time))/60) * (provider_services.price/60),15 * (provider_services.price/60)) as total_price,
    IF((TIME_TO_SEC(TIMEDIFF(requests.end_time,requests.start_time))/60) > 15 ,(TIME_TO_SEC(TIMEDIFF(requests.end_time,requests.start_time))/60),15) as total_time
  FROM
    requests
  LEFT JOIN
    providers ON providers.id = requests.confirmed_provider
  LEFT JOIN
    provider_ratings ON requests.confirmed_provider = provider_ratings.provider_id
  LEFT JOIN
    provider_services ON providers.id = provider_services.provider_id AND provider_services.service_type_id = requests.request_type
  LEFT JOIN
    service_types ON requests.request_type = service_types.id
  WHERE
    (requests.user_id = $request->id AND requests.provider_status != 1 AND requests.status != 2 AND requests.status != 6 AND requests.user_accepted = 1 AND requests.provider_accepted = 1) OR
    (requests.user_id = $request->id AND requests.provider_status != 0 AND requests.status != 0 AND requests.status != 6 AND requests.user_accepted = 1 AND requests.provider_accepted = 1)
  GROUP BY
    requests.id";


$requests = DB::select(DB::raw($query));

如何计算MySQL每小时的价格？

2 个答案:

如何计算MySQL每小时​​的价格？

2 个答案:

如何计算MySQL每小时的价格？