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DescribeActiveOperationTaskRegion查询各地域的运维任务类型和数量-云数据库 MongoDB 版-阿里云

查询MongoDB实例的运维任务类型和任务数量。

阿里云文档 2026-01-08

如何选择PolarDB MySQL引擎计算节点的规格类型

PolarDB MySQL版的集群版和多主集群（Limitless）的计算节点规格包含两种规格类型：通用规格和独享规格。本文为您介绍这两种规格类型的区别，帮助您决策如何选择。

阿里云文档 2025-10-21

PSL4和PSL5两种存储类型有什么区别,如何使用

PSL4和PSL5是PolarDB为不同业务场景所提供的存储类型，两者在价格、数据可靠性及性能方面均存在部分差异。本文为您介绍这两种存储类型的区别，帮助您决策如何选择。

阿里云文档 2025-10-20

PolarDB MySQL版边缘集群支持通过控制台或SQL命令管理高权限、普通及全局只读账号的数据库权限，包括授予、修改和重置多种权限类型。

您可以在控制台或使用SQL命令来管理PolarDB MySQL版边缘集群的账号权限。

阿里云文档 2025-03-14

同步或迁移PostgreSQL数据库中vector类型的数据

在AI领域的大语言模型LLM（Large Language Model）应用中，检索增强生成RAG（Retrieval-augmented Generation）技术通过检索外部的辅助知识库，能够显著提升模型输出的准确性和时效性，解决了LLM知识更新慢、容易产生幻觉（回答不准确）的问题。与传统的关键词检索相比，向量检索具备语义层面的相似性检索能力，支持非结构化数据和多模态数据检索。PostgreS...

文章 2018-07-16 来自：开发者社区

1.NetDh框架之数据库操作层--Dapper简单封装，可支持多库实例、多种数据库类型等(附源码和示例代码)

1.NetDh框架开始的需求场景需求场景： 1.之前公司有不同.net项目组，有的项目是用SqlServer做数据库，有的项目是用Oracle，后面也有可能会用到Mysql等，而且要考虑后续扩展成主从库、多库的需求。(其实不管有没有这个需求，Dapper的封装应当像NetDb框架里封装的那样使用)； 2.涉及日志操作类的设计，需要记录用户操作日志、记录系统异常日志等； 3.涉及缓存操作类的设计....

文章 2009-11-01 来自：开发者社区

通过JDBC检测远端数据库类型（源码）

工作中经常有告诉了一个数据库服务器JDBC连接信息，而不说数据库版本的，以致开发时不敢用该种数据库最新的特性。我写了一段小程序，用于探测远端数据库服务器类型： import java.sql.Connection; import java.sql.DatabaseMetaData; import java.sql.DriverManager; import java.sq...

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更新时间 2024-02-29 14:16:28

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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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