When querying a database table, the result set is typically consistent with the current time, that is, at the time the query is executed. However, the ANSI SQL 2011 update to the standards specified ...

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

They were introduced in SQL Server 2005 as an alternative to system tables. One example is viewing operating system wait statistics via this query: SELECT * FROM sys.dm_os_wait_stats; ...

In earlier versions of SQL Server, after selecting a join algorithm, SQL Server had to process it even if a better alternative might be available. In SQL Server 2017, the query optimizer can now sense ...

This column looks at the reverse process: accepting JSON objects and converting them into relational tables that can be used in any SQL statement. Two caveats: First, even if you’re working with SQL ...

Joey on SQL Server. A Deep Dive into SQL Server 2022's Query Performance Features, Part 1. An update to the cardinality estimator feature in SQL Server 2022 will be one of the biggest changes to ...

This column looks at the reverse process: accepting JSON objects and converting them into relational tables that can be used in any SQL statement. Two caveats: First, even if you’re working with SQL ...