code: public function insert($table, $columns)
      {
          $time = $this->beginCommand("insert into $table");
          $this->db->createCommand()->insert($table, $columns)->execute();
          $this->endCommand($time);
      }
docs: Creates and executes an INSERT SQL statement.
  The method will properly escape the column names, and bind the values to be inserted.
  @param string $table the table that new rows will be inserted into.
  @param array $columns the column data (name => value) to be inserted into the table.