PostgreSQL, how can i populate this table which has two foreign keys as it's fields - sql

Question

I have a problem when trying to populate a table using a script using the psql terminal window and the -f option (this executes the script).
I can populate the piste and lift tables fine no problems at all, but i have another table which contains foreign key's to these tables. I can create the table fine, but i cannot add anything to the table, i simply have no idea how to do this.
My tables:
piste {piste_name {PK}, grade, length, fall, open}
lift {lift_name {PK}, lift_type, summit, rise, length, operating}
lift_location {piste_name*{PK}, lift_name*{PK}}
My script:
CREATE TABLE piste (
piste_name varchar(30) PRIMARY KEY NOT NULL,
grade varchar(10) NOT NULL,
length decimal NOT NULL,
fall smallint NOT NULL,
open boolean NOT NULL
);
CREATE TABLE lift (
lift_name varchar(20) PRIMARY KEY NOT NULL,
lift_type varchar(10) NOT NULL,
summit smallint NOT NULL,
rise smallint NOT NULL,
length smallint NOT NULL,
operating boolean NOT NULL
);
CREATE TABLE lift_location (
piste_name varchar(30) REFERENCES piste(piste_name),
lift_name varchar(20) REFERENCES lift(lift_name),
PRIMARY KEY(piste_name, lift_name)
);
so if i insert some values into these tables:
INSERT INTO lift (lift_name, lift_type, summit, rise, length, operating) VALUES
('test lift', 'gondola', 1920, 440, 1600, true);
INSERT INTO piste (piste_name, grade, length, fall, open) VALUES
('test piste, 'medium', 3, 440, true);
These tables will one row with the specified information. based on the above i want my lift_location table to have the following information:
piste_name | lift_name
________________________
test piste | test lift
How can i accomplish this?
Thanks.
Chris.

Answer 1

You need to run an additional query. You need add a new row to the lift_location table to create the relationship between the two rows in the two tables.
INSERT INTO lift_location (piste_name, lift_name) VALUES ('test piste', 'test lift');
Also make sure both lift and piste tables have the required test data. You're missing a ' in your second INSERT query.