4.1 使用join()方法 join()方法用于指定联表查询的条件: // 查询user表和user_cut表的关联数据$this->db->select('user.username, user_cut.name');$this->db->from('user');$this->db->join('user_cut','user.cut_id = user_cut.id','left');$
我必须使用codeigniter.But的活动记录来左连接这两个键列，用于连接的键列的名称是different.So，我没有...
3、如果一个key在user表和filter_log表中都重复出现1k次，两个表join，总数据量为1k*1k=100w，也就...
例如:$res= $this->db->where(array(“name”=>”admin”,“id>3”=>”2”))->get(); 9.2.4、复杂的查询语句使用$this->db->query($sql,$data);//使用问号绑定参数 9.3、join连接查询 9.3.1、默认为左查询(left join … on) $this->db->select(“字段”) ->from(“数据表名”) ->join('...
If you need a specific type of JOIN you can specify it via the third parameter of the function. Options are: left, right, outer, inner, left outer, right outer and full outer.$this->db->join('comments', 'comments.id = blogs.id', 'left'); // Produces: LEFT JOIN comments ON ...
->join('user_cate','ci_user_cate.id=ci_user.cate_id','left') ->get_compiled_select(); var_dump($res);// "SELECT * FROM `ci_user` LEFT JOIN `ci_user_cate` ON `ci_user_cate`.`id`=`ci_user`.`cate_id` WHERE `ci_user`.`id` = 2 AND `create_at` = 0" ...
$this->db->join('comments', 'comments.id = blogs.id'); $query = $this->db->get(); //可选参数:left,right, outer, inner, left outer,right outer. //LEFT JOIN comments ON comments.id = blogs.id $this->db->join('comments', 'comments.id = blogs.id', 'left'); //WHERE name...
GPL-3.0 license CodeIgniter Basic Helper Summary 1 vài helper cơ bản khi sử dụng với CodeIgniter 3. Có thể đưa vào nhiều bộ code hay framework khác, tuy nhiên có 1 số function require frameworkCodeIgniter, tuy nhiên không ảnh hưởng t...
<?php use CodeIgniter\Database\RawSql; $sql = 'user.id = device.user_id AND ((1=1 OR 1=1) OR (1=1 OR 1=1))'; $builder->join('user', new RawSql($sql), 'LEFT'); // Produces: LEFT JOIN "user" ON user.id = device.user_id AND ((1=1 OR 1=1) OR (1=1 OR 1=...
$this->db->join('activity', 'activity_goods.activity_id = activity.activity_id','left'); if (!$limit) { } else { $query = $this->db->limit($limit, $offset); } $query = $this->db->get(); if ($query->num_rows() > 0) { ...