doutan8601 2017-05-06 22:11
浏览 33
已采纳

将多个数据添加到MySQL中的列的最佳方法

For exemple: I have 'Users' table and a 'Projects' table Multiple users can be members of a project. How do I insert multiple users into the "members" colomun of the Projects table?

Do I separate by comma like: "John, Alex, Hanna"?

I'm a begginner into MySQL, sorry if this is a dumb question. Thanks!

  • 写回答

1条回答 默认 最新

  • doudansui6650 2017-05-06 22:31
    关注

    You defiantly need another table. It should look like this

    Name: UserProjects

    Field: UserId

    Field ProjectID

    Those 2 fields should be primary keys (dual primary id). If you want to go down the route of 'soft deletes' then add a status column which you'll set to 0 if you delete it. Also look up insert on update for mysql.

    Trust me this is the way to go. Using a delimiter field or something will only give you problems later down the line.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 Vue3 大型图片数据拖动排序
  • ¥15 划分vlan后不通了
  • ¥15 GDI处理通道视频时总是带有白色锯齿
  • ¥20 用雷电模拟器安装百达屋apk一直闪退
  • ¥15 算能科技20240506咨询(拒绝大模型回答)
  • ¥15 自适应 AR 模型 参数估计Matlab程序
  • ¥100 角动量包络面如何用MATLAB绘制
  • ¥15 merge函数占用内存过大
  • ¥15 使用EMD去噪处理RML2016数据集时候的原理
  • ¥15 神经网络预测均方误差很小 但是图像上看着差别太大