Php 计算一个值在列中出现的次数，其中liked_id与likes匹配？

有人知道如何计算一个值在单个列中出现的总次数吗

例如，我的表看起来像：

user_id  |  liked_id   |   likes

   3             1           1   
   4             1           1

我要做的是计算liked_id匹配的likes列的总数

那么，id 1有2个喜欢

有人能告诉我怎么做吗

function count_likes() {
            global $connection;
            global $profile_id;
            $query = "SELECT likes, count(*) FROM ptb_likes GROUP BY liked_id";
            $count_likes_set = mysql_query($query, $connection);
            confirm_query($count_likes_set);
            return $count_likes_set;        
        }

试试这个：

SELECT liked_id, SUM(likes) FROM ptb_likes GROUP BY liked_id

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您应该按照

id

SELECT liked_id, count(*)  totalLikes
FROM ptb_likes 
GROUP BY liked_id

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如果只需要like_id为1的行数

SELECT liked_id, COUNT(likes) FROM ptb_likes WHERE liked_id = 1;

如果需要每个like_id的频率：

SELECT liked_id, COUNT(likes) FROM ptb_likes GROUP BY liked_id;

请注意：不要使用SUM，因为它将like_id的所有值相加，如果like_id大于1，则计数将是错误的。使用count代替