Question

从表格中获取行数时遇到问题。

这是我使用codeiginiter的mysql查询：

$this->db->where('rd', 1);
$this->db->where('id_user_first', $user_type);
$this->db->from("messaging");
$this->db->join('answers', "answers.id_message = messaging.id AND answers.id_user != '$user_type'");
$count_reponse  = $this->db->count_all_results();

我收到此错误消息：

解析错误：语法错误，意外'''' （T_CONSTANT_ENCAPSED_STRING），期待'，'或';'在

Answer 1

您可以针对您的问题尝试此解决方案：

请更改查询

$this->db->select('messaging.*, answers.*');
$this->db->from("messaging");
$this->db->join('answers', "answers.id_message = messaging.id");
$this->db->where('answers.id_user <>', $user_type);
$this->db->where('messaging.rd', 1);
$this->db->where('messaging.id_user_first', $user_type);
$count_reponse  = $this->db->count_all_results();

Answer 2

您需要转义引号或将内部双引号更改为单引号。

$this->db->join('answers', 'answers.id_message = messaging.id AND answers.id_user != '.$user_type.'','left');

尝试此查询：

$this->db->where('rd', 1);
$this->db->where('id_user_first', $user_type);
$this->db->from("messaging");       
$this->db->join('answers', 'answers.id_message = messaging.id', 'left');        
$this->db->where('answers.id_user !=', $user_type);
$count_reponse  = $this->db->count_all_results();

我希望它会有所帮助。如果有任何错误，请发表评论。

codeigniter count_all_results with join table

2 个答案: