我有以下表格。
cars
------------------------------------
¦ car_id ¦ color_id ¦ brand_id ¦
------------------------------------
¦ 1 ¦ 1 ¦ 3 ¦
¦ 2 ¦ 2 ¦ 3 ¦
¦ 3 ¦ 1 ¦ 4 ¦
¦ 4 ¦ 3 ¦ 4 ¦
------------------------------------
colors
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¦ color_id¦ color ¦
-----------------------
¦ 1 ¦ red ¦
¦ 2 ¦ blue ¦
¦ 3 ¦ green ¦
¦ 4 ¦ white ¦
-----------------------
brands
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¦ brand_id¦ brand ¦ parent_id ¦
-----------------------------------
¦ 1 ¦ Toyota ¦ 0 ¦
¦ 2 ¦ Nissan ¦ 0 ¦
¦ 3 ¦ Sunny ¦ 2 ¦
¦ 4 ¦ Corrola ¦ 1 ¦
-----------------------------------
companies
---------------------------------
¦ company_id¦ name ¦ location ¦
---------------------------------
¦ 1 ¦ ABC ¦ New York ¦
¦ 2 ¦ XYZ ¦ Florida ¦
¦ 3 ¦ ASD ¦ Texas ¦
¦ 4 ¦ 3MM ¦ Florida ¦
---------------------------------
contacts
-----------------------------------
¦ contact_id¦ name ¦ company_id ¦
-----------------------------------
¦ 1 ¦ James ¦ 1 ¦
¦ 2 ¦ Kevin ¦ 1 ¦
¦ 3 ¦ Mic ¦ 2 ¦
¦ 4 ¦ Nadia ¦ 3 ¦
-----------------------------------
orders
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¦ order_id ¦ company_id ¦ contact_id ¦
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¦ 1 ¦ 1 ¦ 1 ¦
¦ 2 ¦ 1 ¦ 2 ¦
¦ 3 ¦ 2 ¦ 3 ¦
¦ 4 ¦ 3 ¦ 4 ¦
---------------------------------------
order_items
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¦ sn ¦ order_id ¦ car_id ¦ price ¦
---------------------------------------
¦ 1 ¦ 1 ¦ 1 ¦ 100 ¦
¦ 2 ¦ 2 ¦ 2 ¦ 200 ¦
¦ 3 ¦ 3 ¦ 3 ¦ 100 ¦
¦ 4 ¦ 3 ¦ 4 ¦ 150 ¦
---------------------------------------
我正在开发一个网络应用程序，其中我有7个相互连接的表。 我需要一个PHP MYSQL JOIN查询，它将列出以表格形式订购的所有汽车，其中包含以下列：
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¦ Order ID ¦ Company Name ¦ Contact Name ¦ Car Ordered ¦ price ¦
--------------------------------------------------------------------------
¦ 1 ¦ ABC ¦ James ¦ Nissan Sunny, Green ¦ 100 ¦
--------------------------------------------------------------------------
请帮助!!
答案 0 :(得分：0)
Please try with this query:
SELECT orders.order_id as 'Order ID',
companies.name as 'Company Name',
contacts.name as 'Contact Name ',
CONCAT( brands.brand , ', ' ,colors.colcor) as 'Car Ordered',
order_items.price as 'price'
FROM order_items
left outer join orders on orders.order_id = order_items.order_id
left outer join contacts on orders.contact_id = contacts.contact_id
left outer join companies on orders.company_id = companies.company_id
left outer join cars on order_items.car_id =cars.car_id
left outer join colors on cars.color_id = colors.color_id
left outer join brands on cars.brand_id = brands.brand_id
order by brands.brand asc