A method's return statement can return one value at most.
Answer the following statement true (T) or false (F)
True
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Create an ER diagram for each of the following descriptions:
(a) Each company operates four departments, and each department belongs to one company. (Note when the exact cardinality is known (in this example, 4) a value can replace the multiplicity range. (b) Each department in part (a) employs one or more employees, and each employee works for one department. (c) Each of the employees in part (b) may or may not have one or more dependants, and each dependant belongs to one employee. (d) Each employee in part (c) may or may not have an employment history. (e) Represent all the ER diagrams described in (a), (b), (c), and (d) as a single ER diagram.
A(n) ________ allows you to poll the data in your database.
Fill in the blank(s) with the appropriate word(s).
?Online brokers such as ____ and TD Ameritrade are threatening traditional brokerage firms by offering trading over the web with lower fees and commissions.
A. ?E*TRADE B. ?Google Stocks C. ?MSN*Flash D. ?Dow Jones Flash
Based on the discussion in Section 10.4.2, give a precise de?nition of when an access path covers the use of projection, union, and set-di?erence operators.
What will be an ideal response?