Le 21/04/2013 15:30, Dan Lewis a écrit :
Bear in mind as well that if you are using MyISAM as your table memory
storage engine then referential integrity will not be enforced between
tables. The switch to use the InnoDB storage engine by default, which
supports intertable relations and referential integrity, was only
announced fairly recently, so depending on your version of mysql server,
you may, or may not, have InnoDB as your default engine.
In other words, if your default storage engine for your tables is
MyISAM, the only way to enforce relations is through your own
programming logic or that of the application you are using to access the
tables. AFAIK, the various connector drivers know nothing about this,
i.e. you can not enforce referential integrity through an option in the
driver.
http://www.yolinux.com/TUTORIALS/MySQL-InnoDb-Transactions-ForeignKeys.html
Alex
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