Mysql 基于查询获取表的列名

我有一个SQL查询

查询

Select * from `trees` WHERE id = '1' AND ( `apple`='1' OR `banana` = '1' OR `coconut` = '1' OR `pear` ='1') ;

这是我的桌子

树_表

id | apple | banana | coconut | pear|
1     1       1       1           0
2     0       0        1          1
3     1       0        0          1

所以我希望我的输出是

apple
banana
coconut 

这是否可能使用SQL查询，或者甚至PHP也可以执行此操作？您需要取消对数据的绑定。在MySQL中，这可能最容易通过

union-all

实现：

select tree
from ((select id, 'apple' as tree
       from trees
       where apple = 1
      ) union all
      (select id, 'banana' as tree
       from trees
       where banana = 1
      ) union all
      (select id, 'coconut' as tree
       from trees
       where coconut = 1
      ) union all
      (select id, 'pear' as tree
       from trees
       where pear = 1
      )
     ) t
where id = 1;

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@o3203823。如果你特别需要PHP代码，你应该问另一个问题，并把重点放在问题的PHP方面。不，这很好，但我只是想知道如何让PHP来执行这个问题