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我的查询是做比较数据库的数据,如果数据库内容等于或大于搜索条件($肌肉),然后选择数据结果。逻辑需求,查询结构混淆
* -1是一种价值意味着“无限”
的问题是,当数据库中的数据为-1,“事实上,它比每一个正整数小”,但在我的数据库,它比所有的数字更大。执行select查询将数据库的内容导入结果,当数据库内容等于-1时如何才能控制情况?
这里是我的代码:
$device = $_POST['device'];
$provider1 = $_POST['provider1'];
$plantype = $_POST['plantype'];
$dusage = $_POST['dusage'];
$cusage = $_POST['cusage'];
$musage = $_POST['musage'];
//default query
$MSGQuery = " plan.`MSG` >= $musage ";
//when search criteria is unlimited
if($musage == 'Unlimited'){
$MSGQuery = " plan.`MSG` = -1 ";
}//when search criteria is 0
else if ($musage == 0){
$MSGQuery = " plan.`MSG` >= -1 ";
}
else {
$MSGQuery = " plan.`MSG` >= $musage ";
}
echo $planquery="
SELECT plan.*, details.* FROM plan
LEFT JOIN details ON plan.`Name` = details.`Name`
WHERE plan.`Phone` = '$device'
AND plan.`SIMTYPE` = '$plantype'
AND plan.`DATA` >= $dusage
AND plan.`CALL` >= $cusage
AND $MSGQuery ";
$planresult=mysql_query($planquery)
or die ("Query to get data from firsttable failed: ".mysql_error());
while ($prow = mysql_fetch_assoc($planresult)) {