public function column($table, $field, $where = null, $options = null)
    {
        $results = $this->fetch($table, $field, $where, $options);
        return array_shift($results);
    }
public function column($table, $field, $where = null, $options = null)
    {
        $results = $this->fetch($table, $field, $where, $options);
        return array_shift($results);
    }
public function column ( $ table , $ field , $ where = null , $ options = null ) { $ results = $ this -> fetch ( $ table , $ field , $ where , $ options ) ; return array_shift ( $ results ) ; }
Retrieve a single value from a single column.

@param string $table The table(s) to query.
@param string $field The field (column) to query.
@param array $where An SQL where-array.
@param array $options Array of options.
@return mixed A scalar containing the result, or null.
@throws Dabble\Query\SelectException when no row was found.
@throws Dabble\Query\SqlException on error.
Retrieve a single value from a single column .