高并发字段-阿里云

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问一个问题，mongodb在高并发下根据同一个字段更新不同的字段业务是不是会报异常，比如根据用户id更新用户名称等，mongodb会报已有此条件的更新

本问题来自云栖社区【阿里Java技术进阶2群】。https://yq.aliyun.com/articles/690084 点击链接欢迎加入社区大社群。

在高并发、高负载的情况下，如何给表添加字段并设置DEFAULT值？

在高并发、高负载的情况下，如何给表添加字段并设置DEFAULT值？在Oracle 12c之前，当Oracle表数据量上亿时，对表执行“ALTER TABLE XXX ADD COLUMN_XX VARCHAR2(2) DEFAULT 'XXX';”操作时，效率及安全性是必须要考虑的因素。若直接执行...

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更新时间 2024-03-05 14:43:09

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