开发SQL规范的相关内容

阿里云文档 2026-01-13

FlinkSQL任务不同开发方式详解-智能数据建设与治理 Dataphin-阿里云

Dataphin的Flink SQL任务支持多种开发方式，包括原生DDL+DML开发、基于Catalog开发、使用Dataphin元表进行开发、使用Dataphin数据源表进行开发、以及使用计算源物理表进行开发，且不同开发方式所创建的表支持任意混用，包括镜像表。不同开发方式的使用方法、使用场景以及优缺点各异。本文将为您介绍各开发方式帮助您更好地完成Flink SQL任务开发。

阿里云文档 2025-11-04

使用X-编码助手实现MaxCompute代码问答、SQL解释与自动补全-智能数据建设与治理 Dataphin-阿里云

代码助手依赖大模型能力，帮助您在代码任务编程方面，使用低成本操作方式高效完成代码开发。

阿里云文档 2025-09-18

SparkSQL任务快速入门

EMR Serverless Spark支持通过SQL代码编辑和运行任务。本文带您快速体验SQL的创建、启动和运维等操作。

阿里云文档 2025-08-21

配置NL2SQL服务

查询分析服务中的NL2SQL提供将自然语言查询转换为SQL语句的能力，本文介绍如何配置查询分析-NL2SQL服务。

文章 2024-09-08 来自：开发者社区

大数据开发SQL代码编码原则和规范

编码原则SQL代码的编码原则如下：代码功能完善。代码效果参考：http://www.603393.com/sitemap/post.html 代码行清晰、整齐，代码行的整体层次分明、结构化强。代码编写充分考虑执行速度最优的原则。代码中需要添加必要的注释，以增强代码的可读性。规范要求并非强制性约束开发人员的代码编写行为。实际应用中&#...

阿里云文档 2024-07-17

Flink SQL开发调优实践

说明实时计算Flink版控制台界面和功能可能会发生变化，具体请以实际控制台为准。

文章 2022-02-17 来自：开发者社区

【强制】不要使用count(列名)或count(常量)来替代count()，count()是SQL92定义的标准统计行数的语法，跟数据库无关，跟NULL和非NULL无关。说明：count(*)会统计值为NULL的行，而count(列名)不会统计此列为NULL值的行。【强制】count(distinct col) 计算该列除NULL之外的不重复行数，注意 count(distinct col.....

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