Search results
MySQL Workbench Manual / ... / Extending Workbench / Tutorial: Writing Plugins / Tutorial: Generating Foreign Keys with MyISAM
Mysql can parse the foreign key syntax for the myisam table type (meaning no error message will be raised if it encounters an fk definition), making migration from other database products or table engines easier because you do not have to edit the create table statements to remove them.
Use the MyISAM storage engine for read-heavy workloads and applications that require full-text search capabilities. MyISAM storage engine doesn’t support some important features such as transactions and foreign keys, which are essential for data integrity in many applications.
Summary: in this tutorial, you will learn about MySQL foreign key and how to create, drop, and disable a foreign key constraint. Introduction to MySQL foreign key. A foreign key is a column or group of columns in a table that links to a column or group of columns in another table.
MySQL FOREIGN KEY Constraint. The FOREIGN KEY constraint is used to prevent actions that would destroy links between tables. A FOREIGN KEY is a field (or collection of fields) in one table, that refers to the PRIMARY KEY in another table.
You are advised to use foreign keys that reference only UNIQUE (including PRIMARY) and NOT NULL keys. For storage engines that do not support foreign keys (such as MyISAM), MySQL Server parses and ignores foreign key specifications.
To download the MySQL installer, go to the following link http://dev.mysql.com/downloads/installer/. We’ll use the MySQL Installer 8.0.34 to install the MySQL Server and related products such as MySQL Workbench and MySQL Shell.
