FOREIGN KEY: spiegazione e sintassi SQL

Adding foreign key to a table using Sequelize

3 common foreign key mistakes (and how to avoid them)

What is a foreign key? (with SQL examples)

SQL Foreign key

Commonly used SQL Server Constraints: FOREIGN KEY, CHECK and DEFAULT

PARTICIPATIONACTIVITY3.2.6: Add primary and foreign key constraintsThe given SQL creates an Album table and a Song table. The SHOW COLUMNS queries show information about the Album andSong table columns.Modify the two CREATE TABLE statements1. Add a primary key constraint to the Album table's ID column2. Add a primary key constraint to the Song table's ID column.3. Add a foreign key constraint to the Song table so the AlbumID column refers to the Album table's ID column1 – Add a primary key2 CREA