SQL入门数据的相关内容

阿里云文档 2025-08-12

如何通过Spark SQL读写RDS PostgreSQL数据

云原生数据仓库 AnalyticDB MySQL 版支持提交Spark SQL作业，您可以通过View方式访问自建PostgreSQL数据库或云数据库 RDS PostgreSQL 版数据库。本文以RDS for PostgreSQL为例，介绍如何通过Spark SQL读写RDS for PostgreSQL数据。

阿里云文档 2025-04-17

通过Spark SQL读写SQL Server数据

云原生数据仓库 AnalyticDB MySQL 版支持提交Spark SQL作业，您可以通过View方式访问自建SQL Server数据库或云数据库 RDS SQL Server 版数据库。本文以云数据库 RDS SQL Server 版为例，介绍如何通过Spark SQL访问SQL Server数据。

阿里云文档 2025-03-24

通过Spark SQL读DLF管理的数据

数据湖构建 DLF（Data Lake Formation）提供了统一的元数据管理、统一的权限与安全管理、便捷的数据入湖能力以及一键式数据探索能力，您可以在云原生数据仓库 AnalyticDB MySQL 版中通过Spark SQL访问DLF中的元数据。

阿里云文档 2025-01-10

使用SQL查询存在数据延迟问题

问题现象在新增或更新数据后，使用SQL查询数据时无法立即获取最新数据，存在一定的延迟现象。可能原因在为数据表创建多元索引后，使用SQL查询数据时，如果多元索引包含SQL中涉及的所有数据列，则SQL引擎将自动选择该多元索引进行数据查询。更多信息，请参见索引选择策略。索引选择策略而多元索引中的数据可能存...

文章 2024-08-31 来自：开发者社区

SQL 基础入门简直太重要啦！从零开始，带你轻松掌握数据查询与操作，开启数据世界大门！

在当今数字化的时代，数据如同空气一般无处不在，而 SQL（Structured Query Language）则是我们与数据世界交流的重要语言。无论你是初入编程领域的小白，还是对数据处理有着浓厚兴趣的爱好者，掌握 SQL 都是打开数据宝藏大门的关键钥匙。 SQL 的魅力在于它的简洁与强大。它就像是一位魔法师&#x...

文章 2024-08-18 来自：开发者社区

SQL语言入门：如何表达你的数据需求

在数据库的世界里，SQL（Structured Query Language）是一种至关重要的语言，它允许用户与数据库进行交互，执行数据的查询、更新、插入和删除等操作。对于初学者来说，掌握SQL语言的基本表达方式是开启数据库操作之门的钥匙。本文将围绕“SQL语言如何表达数据需求”这一主题，介绍几个关...

阿里云文档 2024-08-16

通过Spark SQL读写AWS S3外表

本文主要介绍如何在云原生数据仓库 AnalyticDB MySQL 版（AnalyticDB for MySQL）中使用Spark SQL读写AWS S3中的数据。

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更新时间 2024-09-02 09:10:20

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云数据库 RDS SQL Server 版

云数据库SQL Server，具有企业许可授权，权限更为开放，引擎功能更为强大。能完美支持Windows平台的.NET架构，支持复杂SQL查询，性能优秀，并有强大的可视化管理工具，帮助您轻松管理数据。

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