$queryb = "SELECT product, imei, country, warranty, config from PRODUCT WHERE product_slno = '$mnserialno' ";
$resultb = mysql_query($queryb, $gndbconn) ;
if(mysql_num_rows($resultb) > 0)
{
$queryc = "UPDATE PRODUCT SET product='$desc', product_slno='$mnserialno',imei='$imei',country='$country',warranty='$warranty',config='$config' WHERE product_slno = '.$mnserialno.' ";
$resutc = mysql_query($queryc, $gndbconn) ;
}
else{
$querya = "INSERT INTO PRODUCT SET product='$desc', product_slno='$mnserialno',imei='$imei',country='$country',warranty='$warranty',config='$config'";
$resulta = mysql_query($querya, $gndbconn) ;
}
我想检查序列号，如果该序列号已经存在于数据库中，那么记录将得到更新，否则它将被插入数据库中。但是代码仅插入记录，没有更新，我没有得到什么错误，如何防止重复输入？
INSERT INTO PRODUCT SET
(`product`, `product_slno`, `imei`, `country`, `warranty`, `config`)
VALUES
('" . $desc . "', '" . $mnserialno . "', '" . $imei . "', '" . $country . "', '" . $warranty . "', '" . $config . "')
ON DUPLICATE KEY UPDATE
product='" . $desc . "',
product_slno='" . $mnserialno . "',
imei='" . $imei . "',
country='" . $country . "',
warranty='" . $warranty . "',
config='" . $config . "'";
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我来说两句