Question

我无法计算有关mysql查询当前状态的总数据。

简而言之，我有3个相互关联的表。

m_shift_schedule     site_shift_schedule      m_ticket
================     ===================     ============
* shift_id   ======>  * shift_id             * ticket_id
* start_time          * shift_date           * ticket_status
* end_time            * user_id   ========>  * ticket_served_by

我的查询：

SELECT user_id,
case when count(m_ticket.ticket_served_by)<2 then 'idle' 
     when count(m_ticket.ticket_served_by)=2 then 'Busy' 
     when count(m_ticket.ticket_served_by)>2 then 'Overload' end as status
FROM site_shift_schedule
LEFT JOIN m_shift_schedule ON site_shift_schedule.shift_id = m_shift_schedule.shift_id
LEFT JOIN m_ticket ON site_shift_schedule.user_id=m_ticket.ticket_served_by
WHERE site_shift_schedule.shift_date =  '2019-02-11' and m_ticket.ticket_status in (4,5,6)
AND CURRENT_TIME > start_time and CURRENT_TIME < end_time
group by user_id

我从上面的查询中得到的输出：

user_id                           Status
=============================   ============
ismail.rahman.saanin@random.co     Idle
lutfi.aldi.nugroho@random.co       Busy

问题是，如果我想让输出变得像这样，我该怎么办：

 Status              Total
==================================
 Idle                 1
 Busy                 1

Answer 1

您可以在下面尝试-使用子查询

select status,count(user_id) as total
from
(
SELECT user_id,
case when count(m_ticket.ticket_served_by)<2 then 'idle' 
     when count(m_ticket.ticket_served_by)=2 then 'Busy' 
     when count(m_ticket.ticket_served_by)>2 then 'Overload' end as status
FROM site_shift_schedule
LEFT JOIN m_shift_schedule ON site_shift_schedule.shift_id = m_shift_schedule.shift_id
LEFT JOIN m_ticket ON site_shift_schedule.user_id=m_ticket.ticket_served_by
WHERE site_shift_schedule.shift_date =  '2019-02-11' and m_ticket.ticket_status in (4,5,6)
AND CURRENT_TIME > start_time and CURRENT_TIME < end_time
group by user_id
)A group by status

Answer 2

同样在group by中的用例

SELECT 
case when count(m_ticket.ticket_served_by)<2 then 'idle' 
     when count(m_ticket.ticket_served_by)=2 then 'Busy' 
     when count(m_ticket.ticket_served_by)>2 then 'Overload' end as status,
     count(*) as total
FROM site_shift_schedule
LEFT JOIN m_shift_schedule ON site_shift_schedule.shift_id = m_shift_schedule.shift_id
LEFT JOIN m_ticket ON site_shift_schedule.user_id=m_ticket.ticket_served_by
WHERE site_shift_schedule.shift_date =  '2019-02-11' and m_ticket.ticket_status in (4,5,6)
AND CURRENT_TIME > start_time and CURRENT_TIME < end_time
group by  case when count(m_ticket.ticket_served_by)<2 then 'idle' 
     when count(m_ticket.ticket_served_by)=2 then 'Busy' 
     when count(m_ticket.ticket_served_by)>2 then 'Overload' end

从当前状态查询MySQL获取总计数

2 个答案: