Create table with constraint based on another column
Say a database has the following tables:
movie(id, title, rent_period)customer(id, name)
I would like to create the following table:
CREATE TABLE rental{
movie_id int,
customer_id int,
rent_date date,
return_date date,
FOREIGN KEY (movie_id) REFERENCES movie(id),
FOREIGN KEY (customer_id) REFERENCES customer(id)
PRIMARY KEY rental_pk (movie_id, customer_id)
}
Can I make make the return_date field be populated automatically as rental(rent_date) + movie(rent_period)?
insert
asked 2 mins ago
jak123jak123
1011
add a comment |
Say a database has the following tables:
movie(id, title, rent_period)customer(id, name)
I would like to create the following table:
CREATE TABLE rental{
movie_id int,
customer_id int,
rent_date date,
return_date date,
FOREIGN KEY (movie_id) REFERENCES movie(id),
FOREIGN KEY (customer_id) REFERENCES customer(id)
PRIMARY KEY rental_pk (movie_id, customer_id)
}
Can I make make the return_date field be populated automatically as rental(rent_date) + movie(rent_period)?
insert
asked 2 mins ago
jak123jak123
1011
add a comment |
Say a database has the following tables:
movie(id, title, rent_period)customer(id, name)
I would like to create the following table:
CREATE TABLE rental{
movie_id int,
customer_id int,
rent_date date,
return_date date,
FOREIGN KEY (movie_id) REFERENCES movie(id),
FOREIGN KEY (customer_id) REFERENCES customer(id)
PRIMARY KEY rental_pk (movie_id, customer_id)
}
Can I make make the return_date field be populated automatically as rental(rent_date) + movie(rent_period)?
insert
asked 2 mins ago
jak123jak123
1011
Say a database has the following tables:
movie(id, title, rent_period)customer(id, name)
I would like to create the following table:
CREATE TABLE rental{
movie_id int,
customer_id int,
rent_date date,
return_date date,
FOREIGN KEY (movie_id) REFERENCES movie(id),
FOREIGN KEY (customer_id) REFERENCES customer(id)
PRIMARY KEY rental_pk (movie_id, customer_id)
}
Can I make make the return_date field be populated automatically as rental(rent_date) + movie(rent_period)?
insert
insert
asked 2 mins ago
jak123jak123
1011
asked 2 mins ago
jak123jak123
1011
asked 2 mins ago
jak123jak123
1011
asked 2 mins ago
jak123jak123
1011
asked 2 mins ago
jak123jak123
1011
1011
add a comment |
add a comment |
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