@Test
public void innerJoinFootballSoccerOnPlayDatePlayTime() {

  Table table1 = createFOOTBALLSCHEDULE();
  Table table2 = createSOCCERSCHEDULE();
  Table joined = table1.joinOn("PlayDate", "PlayTime").inner(true, table2);
  assertEquals(7, joined.columnCount());
  assertEquals(2, joined.rowCount());
}