use northwind alter table employees drop constraint pk_employees 'pk_employees' is a foreign key of anothor table 'Orders',so you couldn't delete this constraint.
Thanks saucer and icevi!!! you are right.can you resolve another problem for me.The title of the problem is :How to send one e-mail to operator when the disk out of sapce?Yesterday evening I attached it!
alter table employees drop constraint pk_employees 'pk_employees' is a foreign key of anothor table 'Orders',so you couldn't delete this constraint.
you are right.can you resolve another problem for me.The title of the problem is :How to send one e-mail to operator when the disk out of sapce?Yesterday evening I attached it!