[英]How to select results from table where `cat` = '$cat' and if it's not then select all from `cat` no matter what $cat is
如何从cat
='$ cat'的表中选择结果,如果不相等,则无论$ cat是什么,都从cat
全选。 这是我的查询
$sql = mysql_query("SELECT * FROM `obiavi` WHERE `postdate`+`days`*86400 > $time AND `town` IN ('$oblasti') AND `desc` LIKE '%$keyword%' ORDER BY id DESC LIMIT $start, $perpage") or die (mysql_error());
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