从多个表中计算总数

Question

我有一个列表，每个部分基本上包含相同的字段。

- p_ticket1_m_site_data   |  - p_ticket1_ticket  |  - p_ticket1_last_row
- p_ticket2_m_site_data   |  - p_ticket2_ticket  |  - p_ticket2_last_row
- p_ticket3_m_site_data   |  - p_ticket3_ticket  |  - p_ticket3_last_row

我可以单独对每张桌子进行计数：

SELECT COUNT( * ) AS tot_sites, IFNULL( COUNT( 
            CASE WHEN p_ticket1_m_site_data.m_date_target = DATE( NOW( ) ) 
            THEN 1 
            ELSE NULL 
            END ),0) AS todays_target, IFNULL( COUNT( 
            CASE WHEN (
            p_ticket1_m_site_data.m_date_target = DATE( NOW( ) ) 
            AND p_ticket1_ticket.t_status =9 ) 
            THEN 1 
            ELSE NULL 
            END ),0
            ) AS todays_achieve, IFNULL( COUNT( 
            CASE WHEN p_ticket1_ticket.t_status =9
            THEN 1 
            ELSE NULL 
            END ),0 ) AS tot_in
            FROM p_ticket1_m_site_data
            LEFT JOIN p_ticket1_last_row ON p_ticket1_last_row.t_m_id = p_ticket1_m_site_data.m_id
            AND p_ticket1_last_row.t_req_type = '04_int_finish_ack'
            LEFT JOIN p_ticket1_ticket ON p_ticket1_ticket.t_id = p_ticket1_last_row.t_id
            WHERE p_ticket1_m_site_data.m_status =1

如果我想统计ticket1、ticket2、ticket3 的所有站点总数，我应该怎么做？

请帮帮我，谢谢。 . .

使用 UNION ALL 的示例：

我只是在上面的代码中为ticket1 和ticket2 使用了UNION ALL，但这不是我想要的。 我的期望输出是统计所有的票表，所以视图是tot_sites（来自所有票）、totdays_target（来自所有票）、todays_achieve（来自所有票）和tot_in（来自所有票）

Answer 1

如果你确定你的表有相同的列，你应该使用 UNION ALL 和 CTE

WITH CTE AS (

SELECT *
FROM p_ticket1_m_site_data
UNION ALL 
SELECT *
FROM p_ticket2_m_site_data
UNION ALL
...

)
SELECT COUNT(*), ...
FROM CTE
WHERE CTE.m_status = 1

CTE UNION ALL

Answer 2

您可以在子查询中合并三组表，然后在主查询中进行计数，主要是这样的

SELECT COUNT( * ) AS tot_sites, IFNULL( COUNT( 
            CASE WHEN m_date_target = DATE( NOW( ) ) 
             THEN 1 
            ELSE NULL 
            END ),0) AS todays_target, IFNULL( COUNT( 
            CASE WHEN (m_date_target = DATE( NOW( ) ) 
            AND t_status =9 ) 
             THEN 1 
            ELSE NULL 
            END ),0
            ) AS todays_achieve, IFNULL( COUNT( 
            CASE WHEN t_status =9
             THEN 1 
            ELSE NULL 
            END ),0 ) AS tot_in
from
(
select * 
FROM p_ticket1_m_site_data
LEFT JOIN p_ticket1_last_row ON p_ticket1_last_row.t_m_id = p_ticket1_m_site_data.m_id
     AND p_ticket1_last_row.t_req_type = '04_int_finish_ack'
LEFT JOIN p_ticket1_ticket ON p_ticket1_ticket.t_id = p_ticket1_last_row.t_id
WHERE p_ticket1_m_site_data.m_status =1
union all
select * 
frOM p_ticket2_m_site_data
LEFT JOIN p_ticket2_last_row ON p_ticket2_last_row.t_m_id = p_ticket2_m_site_data.m_id
AND p_ticket2_last_row.t_req_type = '04_int_finish_ack'
LEFT JOIN p_ticket2_ticket ON p_ticket2_ticket.t_id = p_ticket2_last_row.t_id
WHERE p_ticket2_m_site_data.m_status =1
union all
select * 
fROM p_ticket3_m_site_data
LEFT JOIN p_ticket3_last_row ON p_ticket3_last_row.t_m_id = p_ticket3_m_site_data.m_id
AND p_ticket3_last_row.t_req_type = '04_int_finish_ack'
LEFT JOIN p_ticket3_ticket ON p_ticket3_ticket.t_id = p_ticket3_last_row.t_id
WHERE p_ticket3_m_site_data.m_status =1
) j;

可以整理一下。如果这对您不起作用，请将您的 3 个表格的示例数据和预期输出作为文本添加到问题中，我会进行审核。