在 Codeigniter 中使用第二个数据库

Question

我正在尝试从 Codeigniter 中的第二个数据库进行查询，因此在我的数据库配置中，我有以下内容：

$active_group = 'default';
$active_record = TRUE;

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '';
$db['default']['database'] = 'gallery';
$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;

$db['tc']['hostname'] = 'localhost';
$db['tc']['username'] = 'root';
$db['tc']['password'] = '';
$db['tc']['database'] = 'timecard';
$db['tc']['dbdriver'] = 'mysql';
$db['tc']['dbprefix'] = '';
$db['tc']['pconnect'] = TRUE;
$db['tc']['db_debug'] = TRUE;
$db['tc']['cache_on'] = FALSE;
$db['tc']['cachedir'] = '';
$db['tc']['char_set'] = 'utf8';
$db['tc']['dbcollat'] = 'utf8_general_ci';
$db['tc']['swap_pre'] = '';
$db['tc']['autoinit'] = TRUE;
$db['tc']['stricton'] = FALSE;

在我的模型方法中，我有以下代码：

    public function getAll() 
    {
             $tc = $this->load->database('tc', TRUE);    
             $sql = "SELECT username, MIN(timeIn) 
                     FROM timecard2.tc_timecard
                     GROUP BY userid  having  MIN(timeIn) >? and 
                     MIN(timeIN)<? order by MiN(timeIN);";                                    
            $q=$tc->query($sql,'2013-01-08','2013-01-23');                                    
            if ($q->num_rows() > 0)
            {
                foreach ($q->result() as $row) {
                    $data[] = $row;
                 }
                 return $data;
            }
     }

但它不起作用！查询第二个数据库的方法是否正确？

如果您需要更多说明，请告诉我您需要更多说明的部分。

已编辑： 刚刚发现它可以正常工作吗？ （范围）！ 它适用于以下代码：

    $sql = "SELECT username, MIN(timeIn) 
            FROM tc_timecard
            GROUP BY userid  having  
            MIN(timeIn) > ? and MIN(timeIN) < '2013-01-23' 
            order by MiN(timeIN);";                        

    $q=$tc->query($sql,'2013-01-08');

你知道为什么它没有得到第二个参数吗？

谢谢

Answer 1

每个 codeigniter 的文档：https://www.codeigniter.com/user_guide/database/connecting.html

$tc = $this->load->database($db['tc'], TRUE);