在SQL查询中设置来自别名的变量

时间:2012-05-11 03:33:07

标签: php sql alias

我有一个简单的JOIN查询:

$lstCheck = $dbWHMCS->query('SELECT * FROM tblmonitorports mp 
                            INNER JOIN tblmonitorhosts h ON h.hst_id = port_mon 
                            INNER JOIN tblhosting ho ON ho.id = h.hst_serverid
                            INNER JOIN tblclients cl ON cl.id = ho.userid');

while ($data = $lstCheck->fetch())
{
            $serveridx = $data['ho.id'];
            $clientid = $data['cl.id'];
}

我的问题是我在tblhosting和tblclients表中都有一个“id”列,所以我的变量都有相同的id。我尝试在上面的示例中使用别名设置它(ho。和cl。)但它不起作用。我怎么能在上面的例子中这样做?

谢谢!

2 个答案:

答案 0 :(得分:1)

这个怎么样? (在php细节上有点生疏,但这应该这样做):


$lstCheck = $dbWHMCS->query('SELECT ho.id hid, cl.id cid FROM tblmonitorports mp 
                            INNER JOIN tblmonitorhosts h ON h.hst_id = port_mon 
                            INNER JOIN tblhosting ho ON ho.id = h.hst_serverid
                            INNER JOIN tblclients cl ON cl.id = ho.userid');

while ($data = $lstCheck->fetch())
{
            $serveridx = $data['hid'];
            $clientid = $data['cid'];
}

答案 1 :(得分:1)

您正在使用通配符*选择记录,因此您无法选择这样的字段。

根据您的查询h.hst_serverid& ho.userid具有您想要的完全相同的值。所以只需这样做

while ($data = $lstCheck->fetch())
{
            $serveridx = $data['hst_serverid'];
            $clientid = $data['userid'];
}

但是,选择特定的行也可能听起来更好

$lstCheck = $dbWHMCS->query('SELECT ho.id hid, cl.id cid, ....');

while ($data = $lstCheck->fetch())
{
            $serveridx = $data['hid'];
            $clientid = $data['cid'];
}