SQL Server 2022 introduces CE feedback, which, based on the data collected in the query store, learns which CE model assumptions are valid over time for your queries.

There are two main types of query hints: table hints and join hints. Table hints apply to a single table or view in a query, and affect how SQL Server accesses or locks the data in that table or view.

SQL Server comes with a feature called Query Store, which provides some performance details, including wait information. For more deeper diagnostic information there are a handful of third-party ...

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 ...

However, even without a JSON datatype, SQL Server 2016 still lets you query data stored in JSON format. I’ll look at that support in a later column (among other features, it provides a way to ...

Let's try to run the following query on a table with a CS Index:--CLEAR SQL SERVER QUERY CACHE DBCC DROPCLEANBUFFERS DBCC FREEPROCCACHE SET STATISTICS IO ON SET STATISTICS TIME ON declare @p1 ...

SQL Server 2016 offers a new tool for performance tuning called Query Store. This holds metrics that let you quickly see when an execution plan change has negatively impacted the database.

However, even without a JSON datatype, SQL Server 2016 still lets you query data stored in JSON format. I’ll look at that support in a later column (among other features, it provides a way to ...