Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

Microsoft has just added support for query hints to Azure SQL Database, giving database administrators a powerful tool to manage the performance of ISV application code. Here's how it works.

mcp_ohmy_sql is an open-source Text-to-SQL system developed for deployment in enterprise production. It is not about specific features as much as about integration, scale and reliability: It supports ...

Since SQL Server is in the business of returning your query results and not throwing errors, it uses TempDB to complete the operation. You can see this in Figure 1.

While the last two versions of SQL Server focused on improving performance by offering new features, SQL Server 2016 looks inwards towards improving existing functionality.

For example, Query Store is now enabled for all new databases. Another cool feature is that the Query Store can now help resolve performance issues related to the MAXDOP (maximum degree of parallelism ...

At Build 2025, Microsoft announced the public preview of SQL Server 2025. SQL Server 2025 now has AI directly integrated into the database engine for improved search.

Here's a look at different ways to query Hadoop via SQL, some of which are part of the latest edition of MapR's Hadoop distribution ...