集團通過與工會的mysql選擇查詢

(SELECT COUNT(motorbike.`owner_id`) as count,owner.`name`,transport.`type` FROM transport,owner,motorbike WHERE transport.type='motobike' 
AND owner.`owner_id`=motorbike.`owner_id` 
AND transport.`type_id`=motorbike.`motorbike_id` GROUP BY motorbike.owner_id) 
UNION ALL 
(SELECT COUNT(car.`owner_id`) as count,owner.`name`,transport.`type` FROM transport,owner,car WHERE transport.type='car' 
AND owner.`owner_id`=car.`owner_id` 
AND transport.`type_id`=car.`car_id` GROUP BY car.`owner_id`)

上面的查詢返回的結果是這樣的下方，集團通過與工會的mysql選擇查詢

count   name 
1    Linda 
2    Mary 
1    Steve 
1    Linda

該查詢算多少運輸是由所有者擁有。琳達有一輛汽車和一輛摩托車，所以結果應該：

count   name 
2    Linda 
2    Mary 
1    Steve

我已經試過此查詢，但返回錯誤：

(SELECT COUNT(motorbike.`owner_id`),owner.`name`,transport.`type` FROM transport,owner,motorbike WHERE transport.type='motobike' 
AND owner.`owner_id`=motorbike.`owner_id` 
AND transport.`type_id`=motorbike.`motorbike_id`) 
UNION ALL 
(SELECT COUNT(car.`owner_id`),owner.`name`,transport.`type` FROM transport,owner,car WHERE transport.type='car' 
AND owner.`owner_id`=car.`owner_id` 
AND transport.`type_id`=car.`car_id`) GROUP BY motorbike.owner_id

誰能幫助我嗎？

來源

2011-12-20 user1103332

select sum(qty), name 
from (
    select count(m.owner_id) as qty, o.name 
    from transport t,owner o,motorbike m 
    where t.type='motobike' and o.owner_id=m.owner_id 
     and t.type_id=m.motorbike_id 
    group by m.owner_id 

    union all 

    select count(c.owner_id) as qty, o.name, 
    from transport t,owner o,car c 
    where t.type='car' and o.owner_id=c.owner_id and t.type_id=c.car_id 
    group by c.owner_id 
) t 
group by name

來源

2011-12-20 09:48:16

它的工作......感謝很多;） – user1103332 2011-12-20 09:57:13

這樣一個簡單的方法來做到這一點，但我永遠不會想到這一點。真棒！ – alanaktion 2013-03-15 20:20:31

如何添加訂單和限制？ – 2015-11-28 19:23:53

試試這個編輯：

(SELECT COUNT(motorbike.owner_id),owner.name,transport.type FROM transport,owner,motorbike WHERE transport.type='motobike' AND owner.owner_id=motorbike.owner_id AND transport.type_id=motorbike.motorbike_id GROUP BY motorbike.owner_id) 

UNION ALL 

(SELECT COUNT(car.owner_id),owner.name,transport.type FROM transport,owner,car WHERE transport.type='car' AND owner.owner_id=car.owner_id AND transport.type_id=car.car_id GROUP BY car.owner_id)

來源

2011-12-20 08:53:58

我試過集團通過car.owner_id，但仍返回錯誤 – user1103332 2011-12-20 09:12:21

有什麼錯誤你越來越？如果我有錯誤文本，我可以更好地調試問題 – 2011-12-20 09:16:37

錯誤代碼：1064 這是我得到的錯誤。你的SQL語法有錯誤;檢查與您的MySQL服務器版本相對應的手冊，以在'GROUP BY car.owner_id – user1103332 2011-12-20 09:22:14

這可能是你的後：

SELECT Count(Owner_ID), Name 
FROM (
    SELECT M.Owner_ID, O.Name, T.Type 
    FROM Transport As T, Owner As O, Motorbike As M 
    WHERE T.Type = 'Motorbike' 
    AND O.Owner_ID = M.Owner_ID 
    AND T.Type_ID = M.Motorbike_ID 

    UNION ALL 

    SELECT C.Owner_ID, O.Name, T.Type 
    FROM Transport As T, Owner As O, Car As C 
    WHERE T.Type = 'Car' 
    AND O.Owner_ID = C.Owner_ID 
    AND T.Type_ID = C.Car_ID 
) 
GROUP BY Owner_ID

來源

2011-12-20 09:57:24

集團通過與工會的mysql選擇查詢

回答

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