The key to successful implementation is clearly () the strategy to the whole company.

A.Since the key has lost

B.The key was lost

C.Lost the key

D.Having lost the key

A.if（key=0）

B.if（key==0）

C.for(key=0)

D.while(key=0);

A．Primary Key NOTNULL

B．Primary Key

C．Foreign Key

D．Candidate Key

A．Primary Key NOT NULL

B．Primary Key

C．Foreign Key

D．Candidate Key

A.d.values(key)

B.d.get(key, 9)

C.d.popitem(key)

D.keys(key)

A．PRIMARY KEY

B．FOREIGN KEY

C．FOREIGN KEY (ORDERID) REFERENCES ORDERS

D．FOREIGN KEY (BID) REFERENCES BOOKS

A．FOREIGN KEY

B．PRIMARY KEY

C．FOREIGN KEY(Sno)REFERENCES S

D．FOREIGN KEY(Pno) REFERENCES P

A.key='A';

B.key="A";

C.key=='A';

D.key=="A";

A.delete foreign key

B.drop foreign key

C.delete key FK

D.drop key FK