I have following mysql database tables:
cities
states
countries
with
members
samajs
(a group of people internationally)
and I want to create a query for my dashboard
page which will have following results:
Country Members Samajs Total (table header)
Country1 7 5 16 (country row with total members, samajs and total count)
state1 5 2 7 (state row with total members, samajs and total count)
city1 3 1 4 (all cities in that state, city row with total members, samajs and total count)
city2 2 0 2
state2 2 1 3
Country2 3 2 5 (country row with total members, samajs and total count)
...and vice versa....
Here, members
table will have country_id, state_id and city_id
as foreign key
samajs
table will also have country_id, state_id and city_id
as foreign key
Any idea, what will be query for same?
Thanks !!
Finally, made a single query, which brings me the result as expected with help of union
and subqueries
as below :
SELECT country_id, state_id, city_id, country, membercount, samajcount FROM
(
SELECT con.country_id, -1 as state_id, -2 as city_id, con.country,
(SELECT COUNT(member_id) FROM members WHERE country_id = con.country_id) as membercount,
(SELECT COUNT(samaj_id) FROM samajs WHERE country_id = con.country_id) as samajcount
FROM countries as con
group by con.country
UNION
SELECT s.country_id, s.state_id, -2 as city_id, s.state as country,
(SELECT COUNT(member_id) FROM members WHERE state_id = s.state_id) as membercount,
(SELECT COUNT(samaj_id) FROM samajs WHERE state_id = s.state_id) as samajcount
FROM states as s
group by s.state
UNION
SELECT c.country_id, c.state_id, c.city_id, c.city as country,
(SELECT COUNT(member_id) FROM members WHERE city_id = c.city_id) as membercount,
(SELECT COUNT(samaj_id) FROM samajs WHERE city_id = c.city_id) as samajcount
FROM cities as c
group by c.city
) COUNTRY
order by country_id, state_id, city_id, country ;
Hope it helps someone for their requirements !!
Thanks
I have prepared a query change is according your table fields:
// for country based
SELECT
countries.name AS countryName,
(SELECT
count('x') FROM members WHERE members.country_id = countries.id) as totalMembers,
COUNT(samajs.country_id) as totalSamajs
FROM
`countries`
INNER JOIN samajs ON samajs.country_id = countries.id
GROUP BY
countries.name
ORDER BY
totalMembers DESC
// state based result
SELECT
states.name AS stateName,
(SELECT
count('x') FROM members WHERE members.state_id = states.id) as totalMembers,
COUNT(samajs.state_id) as totalSamajs
FROM
`states`
INNER JOIN samajs ON samajs.state_id = states.id
GROUP BY
states.name
ORDER BY
totalMembers DESC
//city based result
SELECT
cities.name AS cityName,
(SELECT
count('x') FROM members WHERE members.city_id = cities.id) as totalMembers,
COUNT(samajs.city_id) as totalSamajs
FROM
`cities`
INNER JOIN samajs ON samajs.city_id = cities.id
GROUP BY
cities.name
ORDER BY
totalMembers DESC
and as per cakephp method you can follow this question:
Order data based on count of related table data
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