PHP MVC CI中的子查询问题

Question

select * from tblprojects where projectID in 
       (Select ProjectID from tblprojectBackups where Userid = 2 and StatusID = 3) 

我有上面的查询。我在PHP MVC CI中使用下面的代码。

$query = $this->_ci->db->select('*')->from('tblproject'); 
$this->_ci->db->where('`projectid` IN (SELECT `projectid` FROM `tblprojectBackups` 
       where `StatusID`=3 and `UserID`=2)', NULL, FALSE); 
if ($query->num_rows() > 0) { 
} 

这不工作，并给出错误。我在代码中丢失了什么吗？

Answer 1

您可以在codeigniter中直接传递sql queryquery方法。

这样的 -

$sql="select * from tblprojects where projectID in 
      (Select ProjectID from tblprojectBackups where Userid = 2 and StatusID = 3)"; 


$query=$this->db->query($sql); 

return $query->result(); #return object