[英]How to update multiple rows at once in MySQL with calculated date
How to update multiple rows at once in MySQL wit calculated data from db. 如何在MySQL中同时更新多行来自db的计算数据。
oid value1 value2 sum
1 10 20
2 5 -2
3 3 0
4 1 90
I should update the "sum" with php7 at once 我应该立即用php7更新“总和”
Is there a simple option? 有一个简单的选择吗?
一个简单的更新: https : //dev.mysql.com/doc/refman/8.0/en/update.html
UPDATE your-table SET sum = value1 - value2
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