text: Create table If Not Exists Candidate (id int, Name varchar(255));
  Create table If Not Exists Vote (id int, CandidateId int);
  Truncate table Candidate;
  insert into Candidate (id, Name) values ('1', 'A');
  insert into Candidate (id, Name) values ('2', 'B');
  insert into Candidate (id, Name) values ('3', 'C');
  insert into Candidate (id, Name) values ('4', 'D');
  insert into Candidate (id, Name) values ('5', 'E');
  Truncate table Vote;
  insert into Vote (id, CandidateId) values ('1', '2');
  insert into Vote (id, CandidateId) values ('2', '4');
  insert into Vote (id, CandidateId) values ('3', '3');
  insert into Vote (id, CandidateId) values ('4', '2');
  insert into Vote (id, CandidateId) values ('5', '5');
  