Create table with constraint based on another column The Next CEO of Stack OverflowDoes SQL...
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Create table with constraint based on another column
The Next CEO of Stack OverflowDoes SQL manage foreign key constraints in terms of insertion?Reinsert data in new table with new IDsPossible to have nested inserts in Postgres 8.4?Insert from Another Table + Removing Duplicate Entries in PostgresError code 1054: Unknown column when inserting data into a tableInsertion of data violates the foreign key constraintPostgres - Importing multiple rows with Foreign key constraintSQL How to copy text from one table (from one column) to another table (to one column), preferably with IF the target column is emptyUsing COUNT in triggers before insert into tableBlock insertions on a mysql table with specific value
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 4 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 4 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 4 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 4 mins ago
jak123jak123
1011
asked 4 mins ago
jak123jak123
1011
asked 4 mins ago
jak123jak123
1011
asked 4 mins ago
jak123jak123
1011
asked 4 mins ago
jak123jak123
1011
1011
add a comment |
add a comment |
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