code: public QueryBuilder<T, ID> join(String localColumnName, String joinedColumnName,
  			QueryBuilder<?, ?> joinedQueryBuilder) throws SQLException {
  		addJoinInfo(JoinType.INNER, localColumnName, joinedColumnName, joinedQueryBuilder, JoinWhereOperation.AND);
  		return this;
  	}
docs: Similar to {@link #join(QueryBuilder)} but this allows you to link two tables that share a field of the same
  type. So even if there is _not_ a foreign-object relationship between the tables, you can JOIN them. This will
  add into the SQL something close to " INNER JOIN other-table ...".