我在database.php中声明了两个数据库,我如何访问db和db2实例的用户列表
//database initialisation
$CI =& get_instance();
$CI->db1 = $CI->load->database('default', TRUE);
$CI->db2 = $CI->load->database('stylior_db', TRUE);
//select query for db2
$this->$db2->from('users');
// $this->$CI->db2->where('id',1312);
$query = $this->$CI->db2->get();
print_r($query);
if ( $query->num_rows() > 0 )
{
$row = $query->row_array();
return $row;
}
答案 0 :(得分:0)
您可以直接使用$ this关键字来获得结果。您可以使用以下代码来获得结果:
//database initialisation
$CI =& get_instance();
$this->db1 = $this->load->database('default', TRUE);
$this->db2 = $this->load->database('stylior_db', TRUE);
//select query for db2
$this->$db2->from('users');
// $this->db2->where('id',1312);
$query = $this->db2->get();
print_r($query);
if ( $query->num_rows() > 0 )
{
$row = $query->row_array();
return $row;
}
答案 1 :(得分:0)
试试这种方式
SELECT
A.id,
DATEDIFF(A.date_val,B.date_val) AS duration
FROM EMP_RECORDS A
JOIN EMP_RECORDS B
ON A.id = B.id
WHERE A.PARAM_TYPE = "INPUT"
B.PARAM_TYPE = "OUTPUT";