在step 5.7 -> 8.0.23中将mysql从5.6 -> 5.7 -> 8.0.23升级时,我收到一个警告: The following objects use the utf8mb3 characterMore Information:
common_schema- schema's default charac
我有一个非常简单的任务,就是检查某个名称是否已经存在于一个表中,但是问题是mysql_num_rows返回了错误的值。 SELECT cattitle as category WHERE cattitle = '$title'$res = mysql_query($sql, $con) or die(mysql_error())