create table [User]
(
UserId int primary key identity(1,1),
FirstName nvarchar(256) not null,
LastName nvarchar(256) not null,
)
create table Product
(
ProductId int primary key identity(1,1),
UnitPrice decimal(18,2) not null, //For catalog purposes.
Name nvarchar(1000) not null,
Description nvarchar(max) not null,
Stock int not null
)
create table [Order]
(
OrderId int primary key identity(1,1),
UserId int foreign key references [User](UserId),
ProductId int foreign key references Product(ProductId),
UnitCost decimal(18,2) not null, //How much it actually cost when the person bought it.
ItemCount int not null,
Subtotal decimal(18,2) not null
)
create table OrderDetail
(
OrderDetailId int primary key identity(1,1),
?
我被困在订单系统的数据库设计上。
用户可以选择 n 个产品添加到订单请求中。有什么建议么?
按照这里给出的一些建议,这会是什么感觉?有什么陷阱吗?
create table [User]
(
UserId int primary key identity(1,1),
FirstName nvarchar(256) not null,
LastName nvarchar(256) not null,
)
create table Product
(
ProductId int primary key identity(1,1),
UnitPrice decimal(18,2) not null,
Name nvarchar(1000) not null,
Description nvarchar(max) not null,
Stock int not null
)
create table [Order]
(
OrderId int primary key identity(1,1),
UserId int foreign key references [User](UserId),
DateOfOrder datetime not null
)
create table OrderDetail
(
OrderDetailId int primary key identity(1,1),
OrderId int foreign key references [Order](OrderId),
ProductId int foreign key references Product(ProductId),
UnitCost decimal(18,2) not null,
ItemCount int not null,
Subtotal decimal(18,2) not null
)