What is a foreign key with 'set NULL' On 'Event' or Foreign key with 'cascade' On 'Event' in Oracle?

أفضل جواب: <p>for small databases and systems MyIasm is faster than InnoDB , </p> <p> </p> & ... الإطلاع على المزيد

أفضل جواب: <p>A foreign key is used to establish relationships among relations in the relational model. Techni ... الإطلاع على المزيد

أفضل جواب: <p>Be careful what you wish for, is a phrase that comes to mind. Cities winning the opportunity to ... الإطلاع على المزيد

أفضل جواب: Structure can not be assigned null value. in vb.net you do something like Dim d As DateTime = Nothing But ... الإطلاع على المزيد