src/db/BuildSql.php
public function having($field)
    {
        $this->options['having'] = $field;
        $this->bulid['having']   = ' HAVING ' . $this->addFieldTag($field);
        return $this;
    }
public function having($field)
    {
        $this->options['having'] = $field;
        $this->bulid['having']   = ' HAVING ' . $this->addFieldTag($field);
        return $this;
    }
hvaing
@date   2017-11-22T01:18:55+0800
@author ChenMingjiang
@param  [type]                   $field [description]
@return [type]                          [description]