从MYSQL表中选择10+ num_rows

Question

有人可以告诉我这个mysql查询有什么问题吗？

$p = mysql_query("SELECT name,subname FROM brands GROUP BY name WHERE 
having count(*) > 10 ORDER BY RAND() LIMIT 1")or die(mysql_error()); 

它说：

  

您的SQL语法有错误;检查与您的MySQL服务器版本相对应的手册，以便在＆＃39; WHERE having count（*）＆gt;附近使用正确的语法。 10 ORDER BY RAND（）LIMIT 1＆＃39;在第1行

Answer 1

HAVING不使用WHERE子句，将其删除。

$p = mysql_query("SELECT name,subname FROM brands GROUP BY name  
having count(*) > 10 ORDER BY RAND() LIMIT 1")or die(mysql_error()); 

请教：

• http://www.mysqltutorial.org/mysql-having.aspx
• http://dev.mysql.com/doc/refman/5.0/en/group-by-handling.html

您应该考虑使用PDO或prepared statements切换到mysqli_* with prepared statements，因为mysql_*函数已弃用。

Answer 2

删除WHERE子句，您已经有HAVING子句。

所以，你的陈述必须是：

$p = mysql_query("SELECT name,subname FROM brands GROUP BY name HAVING count(*) > 10 ORDER BY RAND() LIMIT 1")or die(mysql_error());