douzen3516 2017-04-28 11:55
浏览 405
已采纳

如何从MySQL中的多个表循环数据?

I have these tables with the following columns:

Article

1.1. title
1.2. text
1.3. sortnr

Congress

2.1. title
2.2. text
2.3. sortnr

And, obviously, others, but these are the ones that are the same. And what I'd like to do is write a query where I can then loop through these fields as if they were from one table.

What it looks like:

SELECT * FROM article, congress ORDER BY sortDate DESC LIMIT 3

but with that I can't use fields like title and so on because during the loop, all the, for example, title fields are being turned in to the ones from congress table.

Is there a way to mix the two tables and treat them like they were from one table considering that they aren't joined in any way?

  • 写回答

1条回答 默认 最新

  • doufu1504 2017-04-28 11:59
    关注

    Try this:

    SELECT *, 'article' as tblnm FROM article
    UNION
    SELECT *, 'konferansenentry' as tblnm FROM konferansenentry 
    ORDER BY sortDate DESC 
    LIMIT 3
    

    It will only work if both table have same field other wise you have to select individual one by one.

    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 metadata提取的PDF元数据,如何转换为一个Excel
  • ¥15 关于arduino编程toCharArray()函数的使用
  • ¥100 vc++混合CEF采用CLR方式编译报错
  • ¥15 coze 的插件输入飞书多维表格 app_token 后一直显示错误,如何解决?
  • ¥15 vite+vue3+plyr播放本地public文件夹下视频无法加载
  • ¥15 c#逐行读取txt文本,但是每一行里面数据之间空格数量不同
  • ¥50 如何openEuler 22.03上安装配置drbd
  • ¥20 ING91680C BLE5.3 芯片怎么实现串口收发数据
  • ¥15 无线连接树莓派,无法执行update,如何解决?(相关搜索:软件下载)
  • ¥15 Windows11, backspace, enter, space键失灵