如何在MySQL中將行分組為單行？
[英]How do I concat grouped rows as a single row in MySQL?
問題描述
我有一個查詢，例如SELECT CONCAT(manufacturer, ':', COUNT(*)) AS count FROM cars GROUP BY manufacturer ，返回的內容如下：
+---------+
| count |
+---------+
| ford:10 |
| fiat:5 |
| kia:2 |
+---------+
現在，我想將這些行GROUP_CONCAT分成1行，例如：
+------------------------+
| result |
+------------------------+
| ford:10, fiat:5, kia:2 |
+------------------------+
但是已經有了GROUP BY，因此GROUP_CONCAT不起作用。 如何使用MySQL實現此目的？
1 個解決方案
解決方案1
3 已采納 2011-04-15 19:26:24
select Group_Concat(count SEPERATOR ',') from
(SELECT CONCAT(manufacturer, ':', COUNT(*)) AS count
FROM cars GROUP BY manufacturer) AS A
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