在MySQL中将行转置为列
问题描述：
如何在MySQL查询中将行转换为列?
How can I convert rows into columns in a MySQL query?
答
您可以使用GROUP_CONCAT将行变成 a 列，但不能以任何自动方式转置整个结果集.您可以编写一个查询来手动生成每一列，也可以在应用程序中完成.
You can turn rows into a column with GROUP_CONCAT, but you can't transpose whole result sets in any automatic way. You either write a query that produces each column manually, or you do it in an application.
这是有关编写复杂查询以模拟换位的教程:
Here's a tutorial on writing the complicated queries to emulate the transposition: