doudao7511 2014-09-30 09:13
浏览 122
已采纳

获取MySQL-Error“未知列”但该列存在

the searchfunction did'nt help me.. My MySQL-Query looks like this:

SELECT * FROM user WHERE username = flo;

and I get this error:

Unknown column 'flo' in 'where clause'

But why? My database does have the table "user", containing multible columns, one column is named "username".

I also have 2 Test-Users, one of their usernames is "flo" so what is wrong?

Thanks for your help!

  • 写回答

1条回答 默认 最新

  • doucong6884 2014-10-08 13:55
    关注

    The reason why you are getting that error message Florian, is because the word flo needs to be wrapped inside quotes.

    SELECT * FROM user WHERE username = 'flo';
    

    In SQL, doing WHERE column = column is valid syntax, but in your case, you are wanting to see if column = (contains) string.

    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

  • ¥20 怎么用dlib库的算法识别小麦病虫害
  • ¥15 华为ensp模拟器中S5700交换机在配置过程中老是反复重启
  • ¥15 java写代码遇到问题,求帮助
  • ¥15 uniapp uview http 如何实现统一的请求异常信息提示?
  • ¥15 有了解d3和topogram.js库的吗?有偿请教
  • ¥100 任意维数的K均值聚类
  • ¥15 stamps做sbas-insar,时序沉降图怎么画
  • ¥15 买了个传感器,根据商家发的代码和步骤使用但是代码报错了不会改,有没有人可以看看
  • ¥15 关于#Java#的问题,如何解决?
  • ¥15 加热介质是液体,换热器壳侧导热系数和总的导热系数怎么算