Count Total from Multiple Tables - mysql

Question

I have list table that basically contains same field on each part.
- 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
I can do a count on each table individually:
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
What should i do if i want to count all total sites from ticket1, ticket2, ticket3 ?
Please help me guys, thanks . . .
Example use UNION ALL:
I just using UNION ALL in my code above for ticket1 and ticket2, but its not what i want.
My expectation output is count all the ticket tables, so the view is tot_sites (from all ticket), todays_target(from all ticket), todays_achieve(from all ticket), and tot_in(from all ticket)

Answer 1

If you are sure that your tables have the same columns, you should use UNION ALL with 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

You can union the three sets of tables in a sub query and then do your counts in the main query , something like this in principal
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;
Which could be tidied up. If this doesn't work for you please add sample data and expected output for your 3 tables as text to the question and I will review.