Whenever rows in the master (referenced) table are deleted (resp. I am putting it here because it is relevant to comment on setting the foreign keys options for 'on update/delete' but is too large for a comment. It specifies the different types of relationships you can stipulate in PHPmyadmin.

This is a summary of a Wikipedia article. In the row for PID, choose PARENT->ID from the dropdown and click GO.īy doing an export on the CHILD table, you should see a foreign key constraint has been created for the PID column. The first dropdown in each row lets you choose which TABLE->COLUMN the indexed column references.

You will be given a table where each row corresponds to an indexed column in your CLIENT table.

While viewing the structure tab of the CHILD table, click the 'relation view' link just above the 'add fields' section.

In the CHILD table, define an index for the PID column.

Make sure ID is the primary key (or at least an indexed column) of the PARENT table.

For both tables, go to the operations tab and change their type to 'INNO DB'.

To setup a foreign key so that the PID column in a table named CHILD references the ID column in a table named PARENT, you can do the following: But since, MySQL only supports foreign constraints on 'INNO DB' tables, the first step is to make sure the tables you are using are of that type. PhpMyAdmin lets you define foreign keys using their 'relations' view. It just makes me uncomfortable not to have the FKs explicitly defined in the database. I am currently using XAMPP, which is easy enough to let me focus on the PHP/CSS/Javascript, and it comes with phpMyAdmin.Īlso, although I haven't been able to set up explicit foreign keys yet, I do have a relational table and can perform joins like this: SELECT * When I choose the foo_bar table, click the 'relation view' link, and try to set the FK columns to be and, it says 'No index defined!' beside each column.įor the sake of simplicity, I want to keep using phpMyAdmin. I created these tables as MyISAM, but have since changed all three to InnoDB, because I read that MyISAM doesn't support foreign keys.

I am trying to create a relational table ( foo_bar) between them, using their primary keys as foreign keys. I have two tables ( foo and bar), indexed on their primary keys. I'm setting up a database using phpMyAdmin.

Phpmyadmin foreign key set