在Codeigniter中使用第二个数据库

Question

I'm trying to query from my second database in Codeigniter, so In my database configuration I have the following:

$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;

and in my model method I have the following code:

    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;
            }
     }

but it does not work! is it the right way to query the second database?

If you need more clarification please let me know which part you need more clarifiocation.

EDITED: Just figured out it works fine with one ? (parameter)! It works for the following code:

    $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');

Do you have any clue why it does not get the second parameter?

Thanks

Answer 1

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

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