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mysql的充值问题
2022-06-26 18:40:00 【CSDN问答】
mysql中怎么样让上一个添加的数据和现在添加的数据相加。比如：累计充值，上一个数据为100元，现在我再充值100元，现在累计充值应该为200元，怎么样操作勒。
一开始我充值100，显示为100
现在我再充值200，显示为200，并不是300
我应该怎么做？
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