Learn how to handle parameter sniffing and cardinality estimation issues in SQL queries, which can affect performance and accuracy. Get practical tips and techniques for SQL query optimization.

Part of the SQL Server 2022 blog series. Cardinality estimation (CE) is a process used by the query optimizer to estimate the number of rows returned by a query or sub-part of a query. These estimates ...

As delivered, SQL Server 2014 decides if the new Cardinality Estimator will be utilized for a specific database based simply on the compatibility level of that database within the SQL Server 2014 ...

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 ...

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 ...

low_card_tables is short for "low-cardinality tables". Cardinality, when applied to a database column, is the measure of the number of distinct values that column can hold. This Gem is meant to be ...

The deep learning-based cardinality estimation is a hot research topic in the field of database query optimization. The SQL query featurization has a direct impact on the quality of cardinality ...