php - AND 和 OR 子句的组合

Question

我想在 CodeIgniter 中实现以下 mysql 语句。

select * from table_name 
         where deleted = 0 and (id = "18" or name = "efgh" or imei = "1244");

我在 CodeIgniter 中编写了以下语句：

$this->db->where('deleted', 0);
$this->db->or_where('id', $this->table_name->id);
$this->db->or_where('imei', $this->table_name->imei);
$this->db->or_where('name', $this->table_name->name);
$result= $this->db->get('table_name')->result();

但是这两个语句给出了不同的输出。谁能指出 CodeIgniter 语句中的错误？谢谢你。

Answer 1

请使用这个：-

   $where = "deleted='0' AND (id='18' OR name='efgh' OR imei='1244')";
   $this->db->where($where);
   $result= $this->db->get('table_name')->result();

有关更多详细信息，您可以访问：-

http://ellislab.com/codeigniter/user-guide/database/active_record.html

Answer 2

我会用

$this->db->where('deleted', 0);
$this->db->where("(id='18' OR name='efgh' OR imei='1244')", NULL, FALSE);
$result = $this->db->get('table_name')->result();

干杯，

Answer 3

我以前也遇到过同样的问题。

我无法弄清楚$this->db功能。

我修改system/database/DB_active_rec.php _compile_select()功能

原文： 1746行

if (count($this->ar_like) > 0) {
  if (count($this->ar_where) > 0) {
    $sql .= "\nAND ";
  }
  $sql .= implode("\n", $this->ar_like);
}

我的变化：

if (count($this->ar_like) > 0) {
  if (count($this->ar_where) > 0) {
    $sql .= "\nAND ("; // open parenthesis for where and like command
  }
  $sql .= implode("\n", $this->ar_like);
  if (count($this->ar_where) > 0) {
    $sql .= "\n)"; // close parenthesis and sample sql text > WHERE column = x AND (LIKE QUERIES)
  }
}

Answer 4

是的，activerecord 使用有问题，或者，如果您使用 activerecord，它将不会为 or 条件添加开始和结束括号，然后进行比较，您的查询将是这样的

select * from table_name where deleted = 0 and id="18" or name = "efgh" or imei = "1244";

使用它

$where = 'deleted = 0 and (id="18" or name = "efgh" or imei = "1244")';

$this->db->where($where);

Answer 5

There is two way to do the same thing.
first 
$condition = "deleted='0' AND (id='18' OR name='efgh' OR imei='1244')";
$this->db->where($condition);
$result= $this->db->get('table_name')->result();
 and 
write your costume query 

$this->db->query('YOUR QUERY HERE');

希望它会帮助你。