数据库sql类的相关内容

阿里云文档 2025-10-20

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 2025-10-20

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 2025-10-20

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 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 2025-10-16

Serverless转按量付费

本文介绍如何将RDS SQL Server实例的付费类型由Serverless转换为按量付费。

文章 2024-11-29 来自：开发者社区

gbase 8a 数据库 SQL合并类优化——不同数据统计周期合并为一条SQL语句

某业务现场存储过程中的多步骤执行SQL优化思路：银利多业务场景涉及存款、大额存单、理财、基金、保险、贵金属多个统计指标，有18条SQL语句。又分别统计7天交易，15天交易，30天交易，60天交易，共计18*4=72条SQL语句。是现场比较典型的应用开发场景，特点是步骤多，但每步...

问答 2022-02-15 来自：开发者社区

请问大神在数据库中可以执行的sql语句，为什么通过java类连接数据库执行报错 ?报错

报错信息： java.sql.SQLException: Already closed.

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跳转至： GO

更新时间 2024-12-12 16:24:18

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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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