php - 通过 phpMyAdmin 执行 MySql #1054 错误

Question

我正在尝试在 phpMyAdmin 中执行此代码。但是，我收到以下错误

#1054 - “字段列表”中的未知列“年份”

SELECT
  CONCAT('SELECT year2,',
  GROUP_CONCAT(sums),
  ' FROM yourtable GROUP BY year2')
FROM (
SELECT CONCAT('SUM(name=\'', name, '\') AS `', name, '`') sums
FROM yourtable
GROUP BY name
ORDER BY COUNT(*) DESC
) s
INTO @sql;

PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

查看fiddle的实现。

如何解决这个问题？以及如何在 PHP 中编写脚本的任何想法？

Answer 1

Year是 MYSQL 中的一个已知对象，如果你有一个名为 'year' 的列，请尝试使用反引号 '`'::

SELECT
  CONCAT('SELECT `year`,',
  GROUP_CONCAT(sums),
  ' FROM yourtable GROUP BY `year`')
FROM (
SELECT CONCAT('SUM(name=\'', name, '\') AS `', name, '`') sums
FROM yourtable
GROUP BY name
ORDER BY COUNT(*) DESC
) s
INTO @sql;

PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;