Verwijderd
Niet. Zie de MySQL manual, het create statemment: http://www.mysql.com/doc/C/R/CREATE_TABLE.html:
"Use the docs, Luke!"The FOREIGN KEY, CHECK, and REFERENCES clauses don't actually do anything. The syntax for them is provided only for compatibility, to make it easier to port code from other SQL servers and to run applications that create tables with references. See section 1.4.4 Functionality Missing from MySQL.