数据库SQL查询的相关内容

阿里云文档 2026-05-26

PolarDB MySQL版边缘云集群的SQL洞察功能默认开启，支持多维度搜索与全量SQL明细采集，助力性能诊断与风险分析。

SQL洞察功能能够对SQL进行健康状况的诊断、性能问题的排查以及业务流量的分析，从而提升故障诊断、数据库优化与风险发现的效率。

阿里云文档 2026-05-21

PolarDB MySQL边缘云集群支持慢SQL查询。

PolarDB MySQL版边缘云集群支持慢SQL查询，默认将执行时间超过1秒的SQL语句定义为慢SQL，默认保存14天。用户可以使用慢SQL功能分析DB性能问题。

阿里云文档 2026-04-16

PolarDB MySQL支持通过控制台或SQL命令管理边缘集群账号密码，包括修改密码、设置过期时间和配置密码验证功能。

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

阿里云文档 2026-04-16

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 2026-01-09

使用并微调NL2SQL模型实现自然语言查询数据库-云原生数据库PolarDB-阿里云

为了使不熟悉SQL语言的用户能够方便地从数据库中进行数据分析，PolarDB for AI推出了自研的基于大语言模型的自然语言到SQL语言转义（Large Language Model based Natural Language to SQL，简称LLM-based NL2SQL）AI模型，作为内置模型供您使用。该功能利用大语言模型（LLM）将日常语言提问直接转换为精确的SQL查询语句，让您无需...

文章 2024-06-21 来自：开发者社区

零基础学习数据库SQL语句之查询表中数据的DQL语句

是用来查询数据库表的记录的语句在SQL语句中占有90%以上也是最为复杂的操作最为繁琐的操作 DQL语句很重要很重要 ...

文章 2024-06-06 来自：开发者社区

MySQL数据库——SQL（3）-DQL（基本查询、条件查询、聚合函数、分组查询、排序查询、分页查询、案例练习）

DQL DQL英文全称是Data Query Language（数据查询语言），数据查询语言，用来查询数据库中表的记录。查询关键字：SELECT 语法 SELECT 字段列表 FROM 表名列表 WHERE 条件...

问答 2024-05-29 来自：开发者社区

PolarDB数据库SQL洞察的查询日志保存多久

问答 2024-04-30 来自：开发者社区

麻烦帮忙看看OceanBase数据库这个问题：同表组分区，没有迁移到一个节点上导致sql跨机查询

https://ask.oceanbase.com/t/topic/35607573/5 麻烦帮忙看看OceanBase数据库这个问题。同表组分区，没有迁移到一个节点上，导致sql跨机查询

文章 2024-04-24 来自：开发者社区

Java从入门到精通：2.3.2数据库编程——了解SQL语言，编写基本查询语句

随着信息技术的飞速发展，数据库已经成为了现代应用程序不可或缺的一部分。对于Java开发者而言，掌握数据库编程技术，特别是了解SQL语言并能编写基本的数据库查询语句，是提升编程能力的重要一环。本文将详细阐述Java数据库编程中SQL语言的基础知识和基本查询语句的编写方法。一、SQL语言概述 SQL（Structured Query Language，结构化查询...

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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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