数据库update的异常一例 | id
然后再开启一个查询界面,新开启事务,也对id=1进行update,会出现拭创
第二种情况:一条 insert,两条 update
谨记给updatepanel中动态添加的控件赋id
mongodb使用增删改查colleciton关联id作为主键实现update
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