![]() I just tested these SQLite foreign key examples on my system, using SQLite version 3.4.0, and they all work fine. INSERT INTO customers VALUES (null, 'FOOBAR', '200 Foo Way', 'Louisville', 'KY', '40207') ![]() INSERT INTO customers VALUES (null, 'ACME, INC.', '101 Main Street', 'Anchorage', 'AK', '99501') Try for FREE SQLite Foreign Key: A Comprehensive Guide to Mastering Database Relationships By Cristian G. INSERT INTO salespeople VALUES (null, 'Barney', 'Rubble', 10.0) INSERT INTO salespeople VALUES (null, 'Fred', 'Flinstone', 10.0) If you'd like to test this SQLite foreign key example in your own SQLite database, here's some sample data for each of these tables: Next, define a SQLite table that has two foreign keys, one that relates a new orders table back to the customers table, and a second foreign key that relates the orders table back to the salespeople table:įOREIGN KEY(customer_id) REFERENCES customers(id),įOREIGN KEY(salesperson_id) REFERENCES salespeople(id)Īs you can see, the SQLite foreign key syntax is very similar to other databases. To show how this works, first define two database tables that don’t have any foreign keys: In the pipelines table, neither the name nor the owner columns are, by themselves, unique. ![]() If they are not the primary key, then the parent key columns must be collectively subject to a UNIQUE constraint or have a UNIQUE index. Here’s a quick SQLite foreign key example. Usually, the parent key of a foreign key constraint is the primary key of the parent table. The SQLite database does support foreign keys, and its foreign key syntax is similar to other databases. SQLite foreign keys FAQ: Can you show me how to define foreign keys in a SQLite database table design? ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |