小编use*_*332的帖子

group by with union mysql select query

(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`)
Run Code Online (Sandbox Code Playgroud)

上面的查询返回如下所示的结果,

count          name
1              Linda
2              Mary
1              Steve
1              Linda
Run Code Online (Sandbox Code Playgroud)

此查询用于计算所有者拥有的传输数量.琳达有一辆车和一辆摩托车,结果应该是:

count          name
2              Linda
2              Mary
1              Steve
Run Code Online (Sandbox Code Playgroud)

我试过这个查询,但返回错误:

(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
Run Code Online (Sandbox Code Playgroud)

有人可以帮我吗?

mysql sql union group-by

42
推荐指数
2
解决办法
11万
查看次数

标签 统计

group-by ×1

mysql ×1

sql ×1

union ×1