Question

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 !!

Answer 1

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