Create Foreign Key Postgresql

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How to add foreign key in PostgreSQL Ask Question Asked 2 years 3 months ago Modified 2 years 3 months ago Viewed 24k times 20 I created this first table named bookstore where Primary Key is book name create table bookstore book name varchar primary key author varchar price decimal Foreign Keys 5.4.6. Exclusion Constraints Data types are a way to limit the kind of data that can be stored in a table. For many applications, however, the constraint they provide is too coarse. For example, a column containing a product price should probably only accept positive values.

Create Foreign Key PostgresqlLet's look at how to create a PostgreSQL foreign key when creating a table. The syntax for this looks as follows. In the Postgres foreign key syntax above, specify the following: is the name to be used to define the foreign key constraint. Foreign Keys Documentation PostgreSQL 16 Supported Versions Current 16 15 14 13 12 Development Versions devel Unsupported versions 11 10 9 6 9 5 9 4 9 3 9 2 9 1 9 0 8 4 8 3 8 2 8 1 8 0 7 4 7 3 7 2 3 3 Foreign Keys Recall the weather and cities tables from Chapter 2