最近，接到一个电商系统的兼职小单，其中订单信息存储在MySQL数据库，而用户信息存储在PostgreSQL数据库。客户那边想有一个统一查询接口，可以通过SQL查询同时获取这两个数据源的信息。 最近，接到一个电商系统的兼职小单，其中订单信息存储在MySQL数据库 ...

DBeaver is a free, open-source, cross-platform SQL client and database administration tool. It is designed to support a wide variety of SQL and NoSQL databases, including MySQL and PostgreSQL.

Announcing SQL Server 2025 (preview): The AI-ready enterprise database from ground to cloud Announcing SQL Server 2025—empowering customers to develop modern AI applications securely using their data, ...

SQL, the Structured Query Language, is a cornerstone skill for anyone working with data. To master this powerful language, consistent practice is crucial. We present a curated list of 12 top-notch ...

He promises attendees will learn: What data virtualization is and its history in SQL Server The three key objects for data virtualization: external data sources, file formats, and tables How to ...

Hackers have been observed trying to breach cloud environments through Microsoft SQL Servers vulnerable to SQL injection. Microsoft's security researchers report that this lateral movement ...

Microsoft today released SQL Server 2022, the latest version of its database software, which originally launched more than 33 years ago. Microsoft describes this release as the “most Azure ...

If not, SQL Server 2022 will use PolyBase services—PolyBase services installation is required for both cases. For a complete list of data sources, please refer to our CREATE EXTERNAL DATA SOURCE ...

Get an overview of JDBC's architecture, then learn how to connect to a database and handle SQL queries and responses ... including connection pooling with DataSource objects, which we’ll look ...