[英]codeigniter join count another table
$query=$this->db->select('*') ->from('activation') ->join('products','products.id_pro = activation.id_pro') ->join('user','user.id = products.user_p') ->order_by('id_key','DESC') ->get();
return $query->result();
我有这些代码,我从 3 个表 abd 连接结果,效果很好。 我需要更多的是来自 4.table 的计数行。 该表称为许可证,我需要计算带有 id_key(表激活的主键)的行数。 如何在我的代码中添加它?
尝试选择许可证列作为计数
$query=$this->db->select('*, COUNT(license.id_key ) as license_count')
->from('activation')
->join('products','products.id_pro = activation.id_pro')
->join('user','user.id = products.user_p')
->join('license','license.id_key = table.column?')
->order_by('id_key','DESC')
->get();
访问对象内的计数,如: $query->result()->license_count;
$query=$this->db->select('BaseTbl.*', 'Products.*', 'User.*', COUNT(License.id_key) as license_count)
->from('activation as BaseTbl')
->join('products as Products','Products.id_pro = BaseTbl.id_pro')
->join('user as User','User.id = Products.user_p')
->join('license as License','License.id_key = BaseTbl.id_key')
->order_by('BaseTbl.id_key','DESC')
->group_by('BaseTbl.id_key')
->get();
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