code: @Override
  	public int count() {
  		if (batch) {
  			throw new IllegalStateException(
  					"Since the parameter has already been set with addBatch() method, please call batch() method.");
  		}
  		try {
  			return agent().update(context());
  		} catch (SQLException e) {
  			throw new UroborosqlSQLException(e);
  		}
  	}
docs: {@inheritDoc}
  
  @see jp.co.future.uroborosql.fluent.SqlUpdate#count()