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mysql 如何累加？

WBOY
Release： 2016-06-23 14:17:33
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MySQL

比如现在我有个值897存在MYSQL里头
新加入763 最终得到897+763

是不是一定要先访问MYSQL取897然后加上763

再写入MYSQL

我现在想要的是 有没有不用先取897直接写入763而写入的值是897+763

等于就是想少访问一次MYSQL

回复讨论(解决方案)

本帖最后由 xuzuning 于 2013-07-30 11:28:43 编辑

如果是数值
updatetbl_name set field_name=field_name+763
field_name 变为 1660

如果是串
updatetbl_name set field_name=concat(field_name, '763')
field_name 变为 897763

楼上正解

多谢~~~~~~~~~~

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