To set up foreign key both the tables need to use InnoDB engine. On analyzing the database, one table was using the InnoDB engine while the other was using MyISAM. Recently one of our customers contacted us as he was not able to create a foreign key. This query is run only when the keys already exist in the relevant table.Ĭommon error when creating a foreign key in MySQL REFERENCES target_table(target_key_name) We run the below query ALTER TABLE table_name Now select the table and now click on the Structure view.įinally, we set the foreign keys. Next, we create a reference for an index we want to apply the foreign key constraints. In Indexing, we define a primary key in the referred table which will work as the foreign key. If the table is in MyISAM, we change it to InnoDB and proceed further. MyISAM has no foreign keys because it is an old system. MySQL only supports foreign key constraints on ‘InnoDB’ tables. Now select the database to add the foreign key. Let us discuss how our Support Engineers setup it for our customers. Recently one of our customers contacted us to create a foreign key for this MySQL database. How to create a foreign key in phpMyAdmin for MySQL InnoDB is the only MySQL database engine that supports foreign keys. It provides a link between data in two tables.įor a column acting as a foreign key, a corresponding value should exist in the link table.įoreign keys and their implementation are more complex than primary keys. Today, let’s see how our Support Engineers create a foreign key for MySQL from phpMyAdmin.Ī foreign key is a column or group of columns in a relational database table. However, users may have trouble finding the options in phpMyAdmin.Īt Bobcares, we receive requests to create foreign key a part of our Server Management Services. It is simple to create a foreign key in phpMyAdmin for a MySQL database.Ī FOREIGN KEY helps to link two tables together.
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