Composite primary key: In the table more than one column is used to specify the primary key is called as composite primary key or composite key. In this case, all foreign keys should also require including all the columns. Composite primary key contains different datatypes.

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Please answer JAVA OOP problem below: Assume you have three data definition classes, Person, Student and Faculty. The Student and Faculty classes extend Person. Given the code snippet below, in Java, complete the method determinePersonTypeCount to print out how many Student and Faculty objects exist within the Person array. You may assume that each object within the Person[] is either referencing a Student or Faculty object. public static void determinePersonTypeCount(Person[] people){ // Place your code here }

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Chapter 5, Problem 12RQ

Program Plan Intro

Composite primary key:

In the table more than one column is used to specify the primary key is called as composite primary key or composite key.

In this case, all foreign keys should also require including all the columns.

Composite primary key contains different datatypes.

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