sql中查询同一列所有值出现的次数

https://blog.csdn.net/love_java_cc/article/details/52234889

SELECT country as 国家,COUNT(*) as 次数 FROM table3 GROUP BY country
posted @ 2023-12-11 17:34  bitterteaer  阅读(54)  评论(0)    收藏  举报