douguai7291 2013-06-14 06:30
浏览 89
已采纳

我们可以将列动态地传递到mysql select语句中

I need to write select statement as we can passe columns in to query dynamically using PHP language.

I have a query like this.

SELECT  `Pro_Csharp` +  `Pro_Java` +  `Pro_VBA` +  `Pro_Cplus` +  `Frameworks_Aspdotnet` +  `Fram_MVCdotnet` +  `Fram_WCF` +  `Fram_Hibernate` +  `Fram_Struts` +  `Fram_Spring` +  `Data_transformations_XML` +  `Data_transformations_XSL` AS total_skill
FROM wp_skilllist
ORDER BY total_skill DESC 

From the interface users can select which subject they want to select.There are about 130 columns. Therefore, I want to handel it dynamically. Is there way to do this?

If we can't do this with mysql and suggestion to this with php language also very helpful.

  • 写回答

2条回答 默认 最新

  • dpw70180 2013-06-14 06:58
    关注

    Build the query string dynamically while parsing the user input:

    $sqlString = 'SELECT ';
    if ($userInput['csharp']) $fields[] = 'Pro_Csharp';
    ...
    $sqlString .= implode (' + ', $fields);
    $sqlString .= ' AS total_skill FROM...'; // rest of your query
    sendQueryWithDriverOfYourChoice($sqlQuery);
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(1条)

报告相同问题?

悬赏问题

  • ¥20 Python安装cvxpy库出问题
  • ¥15 用前端向数据库插入数据,通过debug发现数据能走到后端,但是放行之后就会提示错误
  • ¥15 python天天向上类似问题,但没有清零
  • ¥30 3天&7天&&15天&销量如何统计同一行
  • ¥30 帮我写一段可以读取LD2450数据并计算距离的Arduino代码
  • ¥15 C#调用python代码(python带有库)
  • ¥15 矩阵加法的规则是两个矩阵中对应位置的数的绝对值进行加和
  • ¥15 活动选择题。最多可以参加几个项目?
  • ¥15 飞机曲面部件如机翼,壁板等具体的孔位模型
  • ¥15 vs2019中数据导出问题