When writing complex aggregations in SQL, you will encounter situations where you want to further process data that has already been aggregated. There are two ways to do this: subqueries and CTEs ...

Get up and running—and avoid the setup pitfalls—with this enterprise-class, open-source database available for all major platforms. For years now, PostgreSQL has been one of the best-kept secrets of ...

The core data of almost all industries is the structured data, which is the most important data asset of this era. Therefore, how to effectively utilize and process structured data naturally becomes ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

Part of the SQL Server 2022 blog series. Today, we announced the general availability of SQL Server 2022, the most Azure-enabled release of SQL Server yet, with continued innovation across performance ...

Kafka offset committer helps structured streaming query which uses Kafka Data Source to commit offsets which batch has been processed. This project is not for replacing checkpoint mechanism of Spark ...

Data has become the lifeblood of the enterprise. It’s the foundation for keen insight and effective decisions that lead to business growth. One of our primary design goals for SQL Server 2016 was to ...

Business intelligence (BI) software is a collection of decision support technologies for the enterprise aimed at enabling knowledge workers such as executives, managers, and analysts to make better ...