Error Number: 1064 - php

Question

I'm getting this error while joining two tables in codeigniter.
Error Number: 1064
You have an error in your SQL syntax; check the manual that
corresponds to your MariaDB server version for the right syntax to use
near '.`id = a`.`assignee_key where a`.`assigned_to="office" and
user`.`id="53"`' at line 1
select a`.* from address as `a LEFT JOIN user ON user`.`id = a`.`assignee_key where a`.`assigned_to="office" and user`.`id="53"
$this->db->select('select a.* from address as a LEFT JOIN user ON user.id = a.assignee_key where a.assigned_to="office" and user.id="'.$user_id.'"');
$query = $this->db->get();
return $query->row();

Answer 1

You have got two select. Here is the better/structured version of your query.
$this->db->select("a.*")
->from("address as a")
->join("user","user.id = a.assignee_key","left")
->where(array("a.assigned_to"=>"office","user.id"=>$user_id));
$query = $this->db->get();
return $query->row();
UPDATE: For the comment try left outer join
->join("user","user.id = a.assignee_key","left outer")
It preserves the unmatched rows from the first (left) table, joining them with a NULL row in the shape of the second (right) table.

Answer 2

You have problem in alias table name. Try this
$this->db->select('select a.* from address a LEFT JOIN user u ON u.id = a.assignee_key where a.assigned_to="office" and u.id="'.$user_id.'"');
$query = $this->db->get();
return $query->row();