CodeIgniter是一个流行的PHP框架,它提供了一套简单而强大的工具,用于快速开发Web应用程序。在CodeIgniter中,使用join和if语句更新数据库可以通过以下步骤完成: 首先,确保已经配置好了数据库连接信息。在CodeIgniter的配置文件中(通常是config/database.php),设置好数据库的主机名、用户名、密码和数据库名。 在需要更新...
CodeIgniter是一个轻量级的PHP开发框架,它提供了一套简单而优雅的工具和库,帮助开发者快速构建Web应用程序。在CodeIgniter中,模型(Model)是用于处理数据逻辑的组件。 从-7天获取行是指从当前日期往前推7天,获取数据库中符合条件的记录。在CodeIgniter中,可以通过以下步骤实现: ...
I am trying to join two tables in codeigniter, in these two tables one table contain business idea and in another table it contains vote on each idea. I have given idea_id is foreign key in user_votes table. I need to join these two tables and shows all idea & their respective likes...
SQL JOIN : bad aliasing on join with prefixed db tables #1599 Model's update method fails when validation rules exist #1584 maybe need to modify session garbage collector section. (FileHandler) #1565 Maybe routes has problem. [setTranslateURIDashes] #1564 ErrorException Trying to get property...
Displaying data of two tables on the same web page (1 answer) Closed 11 years ago.I am using join query in CodeIgniter and can't get it to work. It only displays one table data, but not the other. I am new to CodeIgniter and can't figure this out. Pleas someone help me. Tnank...
name: bad aliasing when using prefix on tables in join about: when using prefix on db tables, the aliased table must match to the join table, both uses the prefix or both not to use it. Describe the bug miss match of tables names when using prefix and join, the db tables "dotted" ...
$tables = array('table1', 'table2', 'table3'); $this->db->where('id', '5'); $this->db->delete($tables); // DELETE FROM mytable $this->db->empty_table('mytable'); } //其他实例 public function other() { //链式方法 ...
42.联合查询 left join //controller控制器 $query = array( 'product_id' => $product_id, 'activity.status' => array(1, 2, 0), 'activity.is_del' => 0 ); $query['activity.activity_id<>'] = $activity_id; $goods_list = $this->activity_model->get_activity_good_mapping($query, ...
这个查询看起来很好，只是我们不知道数据是否真的存在于那些连接的表中。如果数据真的存在，你确定吗？
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, and right outer.$this->db->join('comments', 'comments.id = blogs.id', 'left'); // Produces: LEFT JOIN comments ON comments.id =...