5
我有一个问题,我需要在另一个表中引用一个复合键的外键。复合键的外键
我的数据库结构如下:
CREATE TABLE available_trip (
trip_code integer not null,
date datetime not null,
primary key(trip_code, date),
FOREIGN KEY (trip_code) REFERENCES trip (trip_code)
);
CREATE TABLE booking (
available_trip_code integer not null,
customer_code integer not null,
date datetime not null,
deposit float not null,
total_price float not null,
has_paid float not null,
description_en nvarchar(12) null,
finance_type_code nvarchar(12) not null,
primary key(available_trip_code, customer_code, date),
FOREIGN KEY (available_trip_code) REFERENCES available_trip (trip_code, date),
FOREIGN KEY (customer_code) REFERENCES customer (customer_code),
FOREIGN KEY (finance_type_code) REFERENCES finance_type (finance_type_code)
);
我的问题是:我怎么让参考available_trip.trip_code
和available_trip.date
?