From: Date: March 16 2003 7:21pm
Subject: Foreign Key and default action/RESTRICT behaviour?
List-Archive: http://lists.mysql.com/mysql/134850
Message-Id: <03f901c2ebf5$19d68800$0400000a@local>

Hi List, regarding the foreign key definitions:

[CONSTRAINT symbol] FOREIGN KEY (index_col_name, ...)
                  REFERENCES table_name (index_col_name, ...)
                  [ON DELETE {CASCADE | SET NULL | NO ACTION
                              | RESTRICT}]
                  [ON UPDATE {CASCADE | SET NULL | NO ACTION
                              | RESTRICT}]

Is there a default action for ON DELETE and ON UPDATE if no action
is specified in the database definition?

I presume RESTRICT makes it impossible to delete a record from
the parent table if there are any references from a child record to
the parent for that key?

The MySQL documentation on the web does not seem to say
anything about this...


Best regards,
Tor Rune Skoglund
trskog@stripped

sql query