数据库结构字段的相关内容

阿里云文档 2025-06-30

删除不同约束下字段的不兼容场景

本文为您介绍 MySQL 数据库和 OceanBase 数据库 MySQL 租户对于删除不同约束下字段的不兼容场景。

阿里云文档 2025-06-30

修改没有约束的列的字段长度的不兼容场景(MySQL)

本文为您介绍 MySQL 数据库和 OceanBase 数据库 MySQL 租户对于修改没有约束的列的字段长度的不兼容场景。

阿里云文档 2025-04-18

敏感字段加密（rds_encdb）

RDS PostgreSQL提供了rds_encdb插件，用于对查询结果集的敏感列进行加密。同时，通过对数据库账户权限进行设置，相关账户在访问敏感列信息时，仅能获得密文格式的查询结果。

阿里云文档 2025-03-14

在MySQL生态中，修改字段的类型需要使用COPY算法对全表数据进行重建，且重建过程中目标表只能查询数据，不能并发的写入数据。更糟糕的是，COPY算法采用单线程进行全表重建，其效率较低。因此，修改字段类型操作一直是MySQL生态下的痛点问题。为了解决这一问题，PolarDB MySQL版支持秒级修改字段（Instant Modify Column）功能，在修改字段类型时，只需变更表定义信息，无需修...

阿里云文档 2024-11-29

RDS PostgreSQL 秒级加字段DDL最佳实践

本文介绍如何在RDS PostgreSQL中通过设置锁等待超时和自动化重试DDL操作，有效解决在执行添加字段的DDL操作时所遇到的锁阻塞问题，从而减少对业务的影响。

问答 2023-04-26 来自：开发者社区

请问，DMS现在两个数据库对比结构是哪个功能呢，列出哪些字段是有差异但不直接同步数据库结构？![im

请问，DMS现在两个数据库对比结构是哪个功能呢，列出哪些字段是有差异但不直接同步数据库结构？我只想要差异化脚本，不执行，3.目标库为[生产库]时不允许执行。 --- 这条的意思是指可以分析并得到脚本但不执行哇？

文章 2022-02-16 来自：开发者社区

【自然框架】元数据的数据库结构的详细说明和示例（三）：项目与数据库字段的关联

【自然框架】PowerDesigner 格式的元数据的表结构【自然框架】元数据的数据库结构的详细说明和示例（一）：项目描述部分【自然框架】元数据的数据库结构的详细说明和示例（二）：数据库描述部分 1、Manage_FunListCol（列表用字段）字段名中文名类型大小默认值说明 FunctionID 节点ID int 4 1 外键，关联节点...

问答 2022-02-15 来自：开发者社区

我想在mysql设置一个用户，让他的功能有读写权限，追加数据；但是没有修改数据库结构或者字段的权限。

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更新时间 2024-04-30 18:58:27

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数据库审计

满足等保2.0二级和三级 “安全审计”合规要求的同时，智能解析数据库通信流量，细粒度审计数据库访问行为，通过对数据库全量行为的审计溯源、危险攻击的实时告警、风险语句的智能预警，提供数据库资产最安全的监控保障。

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