在 MySQL 中将行转置为列

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时间:2020-08-31 18:41:00  来源:igfitidea点击:

Transpose rows into columns in MySQL

mysqlpivot

提问by Even

How can I convert rows into columns in a MySQL query?

如何在 MySQL 查询中将行转换为列?

回答by Dan Grossman

You can turn rows into acolumn 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.

您可以使用 将行转换GROUP_CONCAT,但不能以任何自动方式转置整个结果集。您要么编写一个手动生成每一列的查询,要么在应用程序中执行。

Here's a tutorial on writing the complicated queries to emulate the transposition:

这是一个关于编写复杂查询以模拟换位的教程:

http://www.artfulsoftware.com/infotree/queries.php#78

http://www.artfulsoftware.com/infotree/queries.php#78