以下查询有什么问题:
SELECT * FROM forms
LEFT JOIN form_fields ON forms.id = form_field.parent_id
LEFT JOIN form_options ON form_field.id = form_options.parent_id
WHERE forms.name = activities
MySQL 说“未知列‘事件’”，显然 forms.name 应该被视为列名
最佳答案
我认为你只是缺少引号，试试这个:
SELECT * FROM forms
LEFT JOIN form_fields ON forms.id = form_field.parent_id
LEFT JOIN form_options ON form_field.id = form_options.parent_id
WHERE forms.name = 'activities'
关于MySQL给出奇怪的错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33187396/