Question

我想问下面的SELECT Class, Race ......查询有什么问题。它会触发DB_ERROR

$db = $this->database[GDB];
$character = $this->site->SanitizeName($_POST['character']);
$num_rows = $db->doQuery('SELECT bNation FROM ACCOUNT_CHAR WHERE strAccountID = ? AND ? IN(strCharID1, strCharID2, strCharID3)', $_SESSION['strAccountID'], $character);
if ($num_rows == -1)
{
    $db->GetError(__file__, __line__);
    $this->m_ccError = Template::GetLangVar('DB_ERROR');
    return false;
}
else if ($num_rows == 0)
{
    $this->m_ccError = Template::GetLangVar('CC_INVALID_ACCOUNT');
    return false;
}

$row = $db->doRead();
$nation = $row['bNation'];

$num_rows = $db->doQuery('SELECT Class, Race, Strong, Sta, Dex, Intel, Cha, Points, TransferTime FROM USERDATA u LEFT JOIN PREMIUM_SERVICE p ON p.strAccountID = ? WHERE strUserId = ? AND (TransferTime < IF(p.strAccountID IS NULL, DATEADD(DAY,-2,GETDATE()), DATEADD(MINUTE,-30,GETDATE())) OR TransferTime IS NULL) AND zone<>199 and authority<>255', $_SESSION['strAccountID'], $character);
if ($num_rows == -1)
{
    $db->GetError(__file__, __line__);
    $this->m_ccError = Template::GetLangVar('DB_ERROR');
    return false;
}
else if ($num_rows == 0)
{
    $this->m_ccError = Template::GetLangVar('CC_RECENT_TRANSFER');
    return false;
}

如果我在下面使用它，它运作良好。我添加了高级检查，因此请检查下面的最后一个不想正常工作。

$num_rows = $db->doQuery('SELECT Class, Race, Strong, Sta, Dex, Intel, Cha, Points, TransferTime FROM USERDATA WHERE strUserId = ? AND (TransferTime < DATEADD(DAY,-2,GETDATE()) OR TransferTime IS NULL) and zone<>199 and authority<>255', $character);

但是如果我在下面使用这个..它会触发$num_rows == -1并显示上面主函数中的DB_ERROR。

$num_rows = $db->doQuery('SELECT Class, Race, Strong, Sta, Dex, Intel, Cha, Points, TransferTime FROM USERDATA u LEFT JOIN PREMIUM_SERVICE p ON p.strAccountID = ? WHERE strUserId = ? AND (TransferTime < IF(p.strAccountID IS NULL, DATEADD(DAY,-2,GETDATE()), DATEADD(MINUTE,-30,GETDATE())) OR TransferTime IS NULL) AND zone<>199 and authority<>255', $_SESSION['strAccountID'], $character);

如果重要，我使用MSSQL Server 2005。我真的很感激任何回应。

Answer 1

而不是 if then else 使用 CASE WHEN

（（TransferTime＆lt; p.strAccountID为NULL时的情况那么DATEADD（DAY，-2，GETDATE（））ELSE DATEADD（MINUTE，-30，GETDATE（））END）或TransferTime IS NULL）
同样完全符合您的选择条款以避免模糊列问题。尝试像
这样的东西
SELECT u.Class，u.Race，u.Strong，u.Sta，u.Dex，u.Intel，u.Cha，u.Points，u.TransferTime
你的ON子句看起来也不错。

这些函数的查询有什么问题？

1 个答案: