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 ...

One area where a lot of development work went into SQL Server 2014 is the area of query optimization where a crucial component got re-written in order to improve query access and predictability. To ...

Cardinality Estimation (SQL Server) [!INCLUDE SQL Server Azure SQL Database] The [!INCLUDE ssNoVersion] Query Optimizer is a cost-based Query Optimizer. This means that it selects query plans that ...

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 ...

Abstract: Cardinality constraints and functional dependencies can enforce complex business rules within database systems. As the interaction of these constraints is intricate on SQL data, data ...