Access数据库使用Update语句更新数据失败，不是原有基础更新，而-Mysql Tutorial-php.cn

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Access数据库使用Update语句更新数据失败，不是原有基础更新，而

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Jun 07, 2016 pm 03:43 PM

accessupdateusedatadatabaserenewstatement

在做一个投票的系统，数据库中的 num 字段的数据需要根据投票人的投票数在原有的基础上进行更新，比如：第一次投票人投了3票，第二次投票人投了2票，这时候 num 字段要由原来的3票更新成5票。但是我使用的这个语句却无法成功。而是下面的这种情况：就是我

Access数据库使用Update语句更新数据失败，不是原有基础更新，而

在做一个投票的系统，数据库中的num字段的数据需要根据投票人的投票数在原有的基础上进行更新，比如：第一次投票人投了3票，第二次投票人投了2票，这时候num字段要由原来的3票更新成5票。
但是我使用的这个语句却无法成功。而是下面的这种情况：

Access数据库使用Update语句更新数据失败，不是原有基础更新，而

就是我第一次投了5票，第二次投了3票，第三次投了4票，第四次投了2票，数据库里面的字段，不是按照num=num+“票数”进行更新的，而是连接成了一个字符串就如图中的那个样子“5342”。

本人还是菜鸟，请大侠来帮忙，感激不尽！

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