我想为每个用户运行一个统计页面。$b = mysql_query("SELECT * FROM B WHERE userID='$userID'");
$b_num=mysql_num_rowsa_num of A <a href='/a/$userID'>(list)</a> | $b_num of B <a href='/b&
我正尝试在一个表上生成新的索引,以便获得最快的查询。我的表名为“conexiones”: `idConexion` int(10) unsigned NOT NULL AUTO_INCREMENTinsta_fecha` (`idInstalacion`,`fFecha`)该表有from conexiones
where con
我在试着在“帖子”表上统计帖子数量,在“主题”表中,
i have id,f_id (f_id= the forum$test2=mysql_query("SELECT *, COUNT(topic_id) AS post_count FROM posts t LEFT JOIN topics p ON p.id =t.id WHERE `f_id`='1' GROUP BY t.id&