@Test
public void innerJoinStudentInstructorOnStateAgeGradYear() {

  Table table1 = createSTUDENT();
  Table table2 = createINSTRUCTOR();
  Table joined = table1.joinOn("State", "Age", "GradYear").inner(true, table2);
  assertEquals(14, joined.columnCount());
  assertEquals(2, joined.rowCount());
}