core/SqlSelector.php
public function having($sql = null, $args = null)
    {
        if (!empty($sql)) {
            if ($this->havingItem == null) {
                $this->havingItem = new SqlCondition();
            }
            $this->havingItem->where($sql, $args);
        }
        return $this;
    }
public function having($sql = null, $args = null)
    {
        if (!empty($sql)) {
            if ($this->havingItem == null) {
                $this->havingItem = new SqlCondition();
            }
            $this->havingItem->where($sql, $args);
        }
        return $this;
    }
结果筛选
@param null $sql
@param null $args
@return $this