关闭。这个问题需要细节或清晰。它目前不接受答案。
**想改进这个问题吗？**通过编辑这个帖子来添加细节并澄清问题。

两年前关门了。
改进这个问题
所以我在大学上sql课，我迷路了。我需要做一个销售订单数据库，显示出售的物品，客人id，地址，价格等。。。
现在，输入图像描述如下：

create table buyer (Guest int not NULL AUTO_INCREMENT,

buyer_first_name varchar(30) not null,

buyer_middle_name varchar(30) not null,

buyer_last_name varchar(30) not null,

address_street varchar(50) not null,

address_apt_num varchar(100) not null,

phone_home varchar(15) not null,

phone_mobile varchar(15) not null,

email varchar(50),

PRIMARY KEY (Guest));

create table item (ProductID int not NULL AUTO_INCREMENT,

PerUnit varchar(50) not null,

Product varchar(50) not null,

Details varchar(200),

PRIMARY KEY (ProductID));

create table sales_order (OrderID int not NULL AUTO_INCREMENT,

Guest int not null,

Date varchar(20),

SpecialInstructions varchar(200),

PRIMARY KEY (OrderID),

FOREIGN KEY (Guest) REFERENCES buyer(Guest)

)ENGINE=INNODB;

create table order_line (OrderID int not null,

ProductID int not null,

Amount int,

PRIMARY KEY (OrderID,ProductID),

FOREIGN KEY (OrderID) REFERENCES sales_order(OrderID),

FOREIGN KEY (ProductID) REFERENCES item(ProductID)

)ENGINE=INNODB;

insert into buyer(buyer_first_name,

buyer_middle_name ,

buyer_last_name ,

address_street ,

address_apt_num ,

phone_home ,

phone_mobile ,

email) values ('Naruto','Ninja','Uzumaki','1234 HokageDrive','1A', '1234567890', '1233126540','naruto@hotmail.com');

INSERT INTO item(Product,Details,PerUnit)

VALUES

('Big Burger Deluxe','Single Patty with Cheese','$1.99'),

('Double Big','2 Patties on a Bun','$2.99'),

('Happy Size Fries','10oz Fries w/ Seasoning','$0.99'),

('Chocolate Shake','Thick Chocolate Shake','$1.49'),

('Strawberry Shake','Thick Strawberry Shake','$1.49'),

('Cherry Pie','Deep-fried cherry Pie with Cream Cheese Icing.','$1.29');

INSERT INTO sales_order(SpecialInstructions,Guest,Date)

VALUES

('Please double bag the order.',1,'Sept. 2, 2015');

INSERT INTO order_line(OrderID,ProductID,Amount) VALUES (1,1,2);

现在我对sql很糟糕，希望友好的“轻推”到正确的方向。我真的很喜欢做这些事！：）
当我跑步时：

select * from buyer a

join sales_order b on

a.Guest=b.Guest

join order_line c on

b.OrderID=c.OrderID

Join item d on

c.ProductID=d.ProductID

我没有得到这些东西的预期输出lines:https://ibb.co/h0np9j（不含行总计）
我从哪里开始？
p、 我正在使用SQLFiddle来完成这个任务。
更新：我的说明：为复杂的联接查询提供sql代码，以显示所附“收据”中包含的所有信息，但计算属性（行合计、小计、增值税和合计）除外。
据我所知，他们一次就要所有的信息？我会要求老师澄清的。预期产量：
在此处输入图像描述

Guest ID    Order ID    FN  MI  LN  Address APT#    Home    Cell    Email   Product ID  Per/Unit    Product Details Amount
1   1   Naruto  Ninja   Uzumaki 1234 Hokage Dr  1A  123 123 narutouzumaki@hotmail.com   1   1.99    Big Burger Deluxe   Single patty with Cheese    2
1   1   Naruto  Ninja   Uzumaki 1234 Hokage Dr  1A  123 123 narutouzumaki@hotmail.com   2   2.99    Double Big  2 Patties on a Bun  2
1   1   Naruto  Ninja   Uzumaki 1234 Hokage Dr  1A  123 123 narutouzumaki@hotmail.com   3   0.99    Happy Size Fries    10oz Fries w/ Seasoning 4
1   1   Naruto  Ninja   Uzumaki 1234 Hokage Dr  1A  123 123 narutouzumaki@hotmail.com   4   1.49    Chocolate Shake Thick Chocolate Shake   1
1   1   Naruto  Ninja   Uzumaki 1234 Hokage Dr  1A  123 123 narutouzumaki@hotmail.com   5   1.49    Strawberry Shake    Thick Strawberry Shake  3
1   1   Naruto  Ninja   Uzumaki 1234 Hokage Dr  1A  123 123 narutouzumaki@hotmail.com   6   1.29    Cherry Pie  Deep-fried cherry Pie with Cream Cheese Icing.  2

******按照链接2，我认为是预期的输出。**更新

我的数据是好的，我能够得到一个内部连接查询工作！

select
b.Guest,
b.buyer_first_name,
b.buyer_middle_name,
b.buyer_last_name,
b.address_street,
b.address_apt_num,
b.phone_home,
b.phone_mobile,
b.email,
s.OrderID,
s.`Date`,
o.ProductID,
i.PerUnit,
i.Product,
i.Details,
s.SpecialInstructions,
o.Amount
from buyer b
inner join sales_order s on b.Guest = s.Guest
inner join order_line o on s.OrderID = o.OrderID
inner join item i on o.ProductID = i.ProductID;