操作的归类的非法混合'='

问题描述

我想从表'invoice_data'中选择数据，其中公司名称的值将通过电子邮件的值从表'crm_accounts'中选择。我收到的错误像

操作'='的非法混合排序规则（utf8_unicode_ci，IMPLICIT）和（utf8_general_ci，IMPLICIT） >

这是我的模型代码：

  public function view_invoice b $ b {
 $ 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（）; 
} 
  

解决方案

>

  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（）; 
} 
  

I want to select data from table 'invoice_data' where the value of company name will be choosen from the table 'crm_accounts' by value of email. I am getting error like

Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '='

This is my model code:

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();
    }

解决方案

try this;

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();
}

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