Mysql 如何在下面的查询中定义where条件（例如：userid！=0）？

如何在下面的查询中定义where条件？除了需要显示的零值外，从数据库中生成

 private function totalVisitedPagesPerUser() {
            $query = "SELECT COUNT(*), " . $this->_db->quoteName('customer_name') . "," . 
                     "\n MAX(". $this->_db->quoteName('visit_timestamp') . ")," .                        $this->_db->quoteName('browser') . "," .
                     $this->_db->quoteName('os') . "," .
                     $this->_db->quoteName('session_id_person') . "," . 
                     $this->_db->quoteName('ip') . "," .
                     "\n SUM(" . $this->_db->quoteName('impulse') . ")," .
                     $this->_db->quoteName('geolocation') .
                     "\n FROM ( SELECT * FROM #__realtimeanalytics_serverstats " . $this->whereQuery . " ORDER BY  `visit_timestamp` DESC) AS INTABLE" .
                     $this->whereQuery .
                     "\n GROUP BY " . $this->_db->quoteName('session_id_person') .
                     "\n ORDER BY " . $this->_db->quoteName('customer_name');
            $this->_db->setQuery($query);
            $results = $this->_db->loadRowList();
            if ($this->_db->getErrorNum()) {
                throw new JRealtimeException(JText::sprintf('COM_JREALTIME_ERROR_RECORDS', $this->_db->getErrorMsg()), 'error');
            }
            return $results;
        }

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您可以通过在查询开始前检查条件来准备where condition变量，而不是在该点追加该变量，如：

$wherecondtion = "Where 1=1";
if($condition1){$wherecondtion."AND (add required filter 1)"}
if($condition2){$wherecondtion."AND (add required filter 2)"}

您的子查询如下所示：

"( SELECT * FROM #__realtimeanalytics_serverstats " . $wherecondtion . " ORDER BY  `visit_timestamp` DESC)"

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这是您需要的东西还是其他东西？

有人来解决这个问题吗？这是您的问题：是添加到子查询中还是添加到主查询中？你能澄清一下吗？在子查询中添加。。。在数据库id中，其中与零混合，所以我需要显示除零值之外的其他值