非法混合排序操作'='

Question

我想从表'invoice_data'中选择数据，其中公司名称的值将根据电子邮件的值从表'crm_accounts'中选择。我收到错误，如

归类（utf8_unicode_ci，隐含的）和（utf8_general_ci，隐含的）操作的非法混合 '='

这是我的模型代码：

public function view_invoice($email) 
    { 
     $this->db->select('invoice_data.*, crm_accounts.company'); 
     $this->db->from('invoice_data'); 
     $this->db->join('crm_accounts', 'invoice_data.cname = crm_accounts.company', 'inner'); 
     $this->db->where('crm_accounts.email', $email); 
     $query = $this->db->get(); 
     return $query->result_array(); 
    } 

Answer 1

试试这个;

public function view_invoice($email) 
{ 
    $this->db->select('invoice_data.*, crm_accounts.company'); 
    $this->db->from('invoice_data'); 
    $this->db->join('crm_accounts', 'invoice_data.cname = crm_accounts.company COLLATE utf8_unicode_ci', 'inner'); 
    $this->db->where('crm_accounts.email', $email); 
    $query = $this->db->get(); 
    return $query->result_array(); 
}