php - 如何在 php 中获取超过 x 行的特定列值？

Question

在我的 MySQL“购买”表中，一列存储用户名，因为每次完成的购买都与其他详细信息(如购物车 ID、金额)一起存储在这里，我想获取用户名有超过 10/50/100 次购买的内容。

我可以获得每个用户的购买记录数，但我想按行数过滤结果。这是我为每个用户获取记录数的查询。

$query = MySQL_query("SELECT user_name, COUNT(*) as count FROM purchase GROUP BY user_name ORDER BY count DESC") or  die(MySQL_error());

谢谢

Answer 1

使用HAVING子句

SELECT user_name, 
COUNT(*) as count1 
FROM purchase 
GROUP BY user_name 
HAVING COUNT(*) IN (100, 50, 10)
ORDER BY count1 DESC

(或)使用外部选择并像这样过滤

SELECT * FROM
(
SELECT user_name, 
COUNT(*) as count1 
FROM purchase 
GROUP BY user_name ) xx
WHERE count1 IN (100, 50, 10)
ORDER BY count1 DESC