mysql> select count(id) total from applicants;| total || 0 |1 rowin set (0.00 sec)
+-------++-------+1 row in set (0.00 sec)
mysql> select count(id) tota
我在db中有一个歌曲名,在更新时,db中有更多的重复行。例如:-ID - 201 | TAGS - akon我需要省略重复的数据或删除重复的行。$result = mysql_query("SELECT * FROM tags WHERE tag !='' ORDER by id DESC LIMIT 30");
while($