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[英]Mixing Active Records with Standard SQL Query in Codeigniter
[英]Converting Sql query to CodeIgniter Active Records
我想只查询那些喜欢最高的项目。
这是我要转换为CodeIgnitor的Active Records的SQL查询:
SELECT *, SUM(like) as totalLikes
FROM tbl_like
GROUP BY uploadID
ORDER BY totalLikes DESC
LIMIT 2
笨:
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,我遇到了这个错误
您的SQL语法有错误; 查看与您的MySQL服务器版本对应的手册,以便在'like)附近使用正确的语法作为totalLikes FROM(
tbl_like
)GROUP BYuploadID
ORDER BYtotalLikes
'在第1行
SELECT `uploadID`, SUM(like) as totalLikes FROM (`tbl_like`) GROUP BY `uploadID` ORDER BY `totalLikes` desc LIMIT 2
这段代码出了什么问题?
谢谢您的帮助。
这对你有用。 请注意,您使用保留关键字,所以应该用backtic``包围。
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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