code: public List<Object> querySingleColumnResults(String sql, String[] args,
  			int column) {
  		return db.querySingleColumnResults(sql, args, column);
  	}
docs: Query for values from a single column
  
  @param sql
  sql statement
  @param args
  arguments
  @param column
  column index
  @return single column results
  @since 3.1.0