donglan7594 2011-12-19 20:26
浏览 55
已采纳

PHP MySQL在单个表中计算多个列

I'm trying to count different columns in a single table and store them as variables in PHP, I don't think I should be doing it this way I don't think:

$dog_count = mysql_fetch_array(mysql_query("SELECT COUNT(*) FROM animals WHERE animal='dog'"));
$cat_count = mysql_fetch_array(mysql_query("SELECT COUNT(*) FROM animals WHERE animal='cat'"));
$parrot_count...

I'm thinking there is probably a better way to count statistics. Any advice?

Thanks :)

  • 写回答

1条回答 默认 最新

  • doujingao6210 2011-12-19 20:28
    关注

    You could get all the aminals and their respective counts in one query:

    SELECT animal, COUNT(*) AS AnimalCount
        FROM animals
        GROUP BY animal
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 如何让企业微信机器人实现消息汇总整合
  • ¥50 关于#ui#的问题:做yolov8的ui界面出现的问题
  • ¥15 如何用Python爬取各高校教师公开的教育和工作经历
  • ¥15 TLE9879QXA40 电机驱动
  • ¥20 对于工程问题的非线性数学模型进行线性化
  • ¥15 Mirare PLUS 进行密钥认证?(详解)
  • ¥15 物体双站RCS和其组成阵列后的双站RCS关系验证
  • ¥20 想用ollama做一个自己的AI数据库
  • ¥15 关于qualoth编辑及缝合服装领子的问题解决方案探寻
  • ¥15 请问怎么才能复现这样的图呀