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MySQL Community Edition is a freely downloadable version of the world's most popular open source database that is supported by an active community of open source developers and enthusiasts. MySQL Cluster Community Edition is available as a separate download.
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- 17.19 InnoDB and MySQL Replication
It is possible to use replication in a way where the storage...
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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.
MySQL Workbench Manual / ... / Extending Workbench / Tutorial: Writing Plugins / Tutorial: Generating Foreign Keys with MyISAM
It is possible to use replication in a way where the storage engine on the replica is not the same as the storage engine on the source. For example, you can replicate modifications to an InnoDB table on the source to a MyISAM table on the replica. For more information see, Section 19.4.4, “Using Replication with Different Source and Replica Storage Engines”.
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.
The recommended engine to use foreign keys is InnoDB, and honestly, for 99% of cases InnoDB is better. You can easily change all your database to use InnoDB instead of MyISAM: add default_storage_engine = InnoDB to /etc/mysql/my.cnf (or equivalent)
4 lut 2017 · It's a little bit of work, but you can do this using triggers, see e.g. here or here. Although you might want to consider changing your hosting site, because there is other stuff that you cannot do in MyISAM (probably most importantly transactions), and, in case that site doesn't support innodb not by choice but because it is too old, because a ...
