数据库导出备份的相关内容

阿里云文档 2025-06-27

PolarDB备份原理

PolarDB集群的数据备份是指在某个时间点上对集群的全量数据进行备份，生成一个备份集（快照）。该备份过程采用ROW（Redirect-on-Write）快照机制，直接存储在PolarDB集群的分布式存储系统上。在保存备份时，数据并未被真正复制。而当数据块发生修改时，系统会将历史版本的数据块保留给快照，同时生成一个新的数据块被原数据引用（Redirect）。本文将详细介绍创建备份、删除备份以及在数...

阿里云文档 2025-06-27

PolarDB备份原理

阿里云文档 2025-06-23

物理备份上云方案

阿里云文档 2025-06-12

查看数据灾备备份集

数据备份完成后，您可以通过备份集列表查看备份集，并对其进行管理、删除以及下载等操作。本文将介绍如何查看备份集。

阿里云文档 2025-02-13

PolarDB MySQL备份原理

文章 2024-07-04 来自：开发者社区

Navicate，数据库，Mysql，改表，4月29日Finished - Unsuccessfully，导出数据不妨，右键，备份一下Mysql数据库的内容，你想导入和导出数据不如，用查询的方式去做

添加字段之后，还有更简单的方法，修改完设计表之后，自己数据库字段不显示重新复制一张表，到其他数据库当中，该字段就显示出来了 ...

文章 2023-08-08 来自：开发者社区

数据库的导入和导出（恢复与备份）

数据的导入与导出，即数据的恢复与备份一：导出数据语法：mysqldump -h IP -u 用户名 -p -d 数据库名 > 导出的文件名导出所有数据mysqldump -u root -p'HuaWei@123' --all-databases > /tmp/mysqld/db.dump 导出数据库mysqldump -u root -p'HuaWei@123' --datab...

问答 2022-04-15 来自：开发者社区

网站数据库如何导出备份

文章 2022-02-17 来自：开发者社区

linux服务器oracle数据库导出dmp文件功能演示，备份数据库命令。exp命令显示command not found解决方法，EXP-00028: 无法打开dmp进行写入问题解决

默认需要切 oracle 用户才可以用，命令su - oracle。直接用 exp 命令会显示 command not foundnctest205:~ # exp ncc_auto_0513/1@orcl file=/data/oracle/ncc_auto_0513.dmp owner=ncc_auto_0513 -bash: exp: comma....

文章 2022-02-16 来自：开发者社区

5.非关系数据库（Nosql）它mongodb：创建一个集合，导出和导入备份，数据恢复，进出口

1 固定集合固定集合值得是事先创建并且大小固定的集合 2 固定集合的特征：固定集合非常像环形队列。假设空间不足，最早文档就会被删除，为新的文档腾出空间。一般来说。固定集合适用于不论什么想要自己主动淘汰过期属性的场景，没有太多的操作限制。 3 创建固定集合使用命令： db.createCollection(“collectionName”,{capped:true,s...

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更新时间 2024-07-05 14:43:54

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