What is the minimum and maximum values of r

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Reference no: EM133913838

Problem

An E/R diagram has a 3-way relationship R among the entity sets E1, E2, and E3, where the connection from R to E3 is a sharp arrow, and to E1 and E2 are simple lines (no arrows). Suppose we have valid instances of E1, E2, and E3 in which the number of tuples they include are e1, e2, and e3, respectively. Get the instant assignment help.

1. What is possible range of values of e1, i.e., minimum and maximum values for e1?

2. What is the minimum and maximum values of |R| as a function of e1, e2, and e3?

3. Suppose e1 = 10, e3 = 30 and |R| ≤ 200. What is the range of values for e2?

Reference no: EM133913838

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