($dbhost, $dbuser, $dbpass) or die (mysql_error());
mysql_select_db($dbname) or die';
$result = mysql_query($sql) or die(mysql_error());
// Since query has now completed'<br
我有以下查询: SELECT TIMESTAMPDIFF(HOUR,timestam,NOW()) AS HoursDifference我需要帮助编写一个SQL查询,这将花费这个小时,并从48减去它给出的答案是48,47,46或45。HoursDifference18HoursDifference4740