If the constraints on the ORDER# and ITEM# columns of the ORDERITEMS table were created as a PRIMARY constraint, and the actual constraint name is not known, which of the following commands can be used to delete the constraint?
a. ALTER TABLE orderitemsDROP ALL CONSTRAINTS;
b. ALTER TABLE orderitemsDELETE ALL CONSTRAINTS;
c. ALTER TABLE orderitemsDROP PRIMARY KEY;
d. ALTER TABLE orderitemsDELETE PRIMARY KEY;
c
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You have your own Internet business where you buy close-out stuff from stores and sell them on-line at a higher price. Your only cost is what you pay for the items and the shipping charge per item. Last year you bought and then sold 1,000 pieces. This year you expect to double that, at unchanged purchase and sale prices. Which of the following will be higher this year than last?
a) profits b) profit margin c) both d) neither
When a firm's competitive advantage is based on technological competence, a joint venture is the preferred mode of entry into a foreign market because it reduces the risk of losing control over that competence
Indicate whether the statement is true or false.