我的MySQL语法有什么问题？

Question

I've followed the syntax guide for creating tables exactly how it should be but I keep getting a syntax error. Can someone help me out?

$createQuery = sprintf("CREATE TABLE %s(message_ID INT NOT NULL AUTO_INCREMENT, message TEXT, sender TEXT, recipient TEXT, PRIMARY KEY( message_ID )) ENGINE=MyISAM;",$tablename);
$createResult = mysqli_query($connect, $createQuery);

$tablename in this case is 1-3

Answer 1

您需要像这样转义表名

$tablename = '`1-3`';

Answer 2

Try adding back ticks to the %s :

$createQuery = sprintf("CREATE TABLE `%s` (message_ID INT NOT NULL AUTO_INCREMENT, message TEXT, sender TEXT, recipient TEXT, PRIMARY KEY( message_ID )) ENGINE=MyISAM;",$tablename);
$createResult = mysqli_query($connect, $createQuery);

Also your original code had the %s right next to the parenthesis ( . Technically with back ticks, that should not be an issue, but you should get in the habit of just adding spaces between things when dealing with MySQL queries.

That said, you could also achieve the same results without sprintf() by just placing $tablename directly into the code because double-quotes allow for string substitution:

$createQuery = "CREATE TABLE `$tablename` (message_ID INT NOT NULL AUTO_INCREMENT, message TEXT, sender TEXT, recipient TEXT, PRIMARY KEY( message_ID )) ENGINE=MyISAM;";
$createResult = mysqli_query($connect, $createQuery);