An update to the cardinality estimator feature in SQL Server 2022 will be one of the biggest changes to the database engine since its inception. Database engines like SQL Server are incredibly complex ...

With all the cheerleading and the steady drumbeat of new features being released to Azure, it’s easy to lose track of the many cool and valuable new features released in the on-premises version of SQL ...

Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with content, and download exclusive resources. Cory Benfield discusses the evolution of ...

New Cardinality Estimator: SQL Server’s cardinality estimator, a key component using in query optimization, has been running on a code base first written for the SQL Server 2005 release. The new SQL ...

In this contest the task was to build a real-time cardinality estimator for a table containing two integer columns. Cardinality estimation is at the heart of query optimization in relational databases ...

A cardinality estimator, AKA (probabilistic) sketch, AKA probabilistic counter is a probabilistic data structure that has an “add” primitive similarly to a dictionary, but does not have a ...

Query engines are really good at choosing an efficient query plan. Users do not need to worry about how they write their query, since the optimizer makes all the right choices for executing the query ...