我只想查询喜欢度最高的商品。
这是我想转换为CodeIgnitor的活动记录的sql查询:
SELECT *, SUM(like) as totalLikes
FROM tbl_like
GROUP BY uploadID
ORDER BY totalLikes DESC
LIMIT 2
CodeIgniter:
public function get_cheezyPic(){
$this->db->select('uploadID, SUM(like) as totalLikes');
$this->db->from('tbl_like');
$this->db->group_by('uploadID');
$this->db->order_by('totalLikes DESC');
$this->db->limit(2);
$query= $this->db->get();
return $query->result_array();}
但是当我尝试运行此代码时,出现了此错误
您的SQL语法有误。检查与您的MySQL服务器版本相对应的手册以获取正确的语法,以在第1行的“ like”附近使用totalLikes FROM(
tbl_like
)GROUP BYuploadID
ORDER BYtotalLikes
'
SELECT `uploadID`, SUM(like) as totalLikes FROM (`tbl_like`) GROUP BY `uploadID` ORDER BY `totalLikes` desc LIMIT 2
此代码有什么问题?
谢谢您的帮助。
这会为您工作。请注意,您使用的是reserved关键字,因此应使用反斜线 ``括起来。
public function get_cheezyPic(){
$this->db->select('uploadID, SUM(`like`) as totalLikes',false);
$this->db->from('tbl_like');
$this->db->group_by('uploadID');
$this->db->order_by('totalLikes DESC');
$this->db->limit(2);
$query= $this->db->get();
return $query->result_array();
}
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