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Introducing Interleaved Execution for Multi-Statement Table Valued Functions
For SQL Server vNext and Azure SQL Database, the Microsoft Query Processing team is introducing a new set of adaptive query processing improvements to help fix performance issues that are due to poor...
View ArticleHow to find query plan choice regressions with SQL Server 2017 CTP2
SQL Server 2017 in CTP2.0 version automatically identifies potential performance regressions in SQL queries, enables you to easily find potential issues, and gives you information what should you do...
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“You Shall Not Regress!!!”– How SQL Server 2017 prevents plan regressions?
SQL plan regression is a case when a T-SQL query that executed fine becomes much slower or uses more resources because the underlying SQL plan changed. SQL Server 2017 would not allow that kind of...
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Automatic index management in Azure SQL database
Azure SQL Database has a built-in intelligence mechanism that can automatically tune and improve performance of your queries by dynamically adapting the database schema to your workload. In Azure SQL...
View ArticleAutomatic plan correction in SQL Server 2017
Automatic plan correction is a new automatic tuning feature in SQL Server 2017 that identifies SQL query plans that are worse than previous one, and fix performance issues by applying previous good...
View ArticleSQL Server Replication enhancement in SQL Server 2016
Replication is a widely-adopted feature in SQL Server to copy and distribute data and database objects from one database to another and then synchronizing between databases to maintain consistency. In...
View ArticleUse WITH clause in OPENJSON to improve parsing performance
OPENJSON function has a WITH clause where you can specify what fields should be extracted from input JSON. This might improve performance of your queries compared to the case where you use OPENJSON...
View ArticleWhat is plan regression in SQL Server?
Plan regression happens when SQL Server starts using the sub-optimal SQL plan to execute some T-SQL query. Usually you will see that some T-SQL query is executing really fast, but then it gets slower...
View ArticleLoading files from Azure Blob Storage into Azure SQL Database
Azure SQL Database enables you to directly load files stored on Azure Blob Storage using the BULK INSERT T-SQL command and OPENROWSET function. Loading content of files form Azure Blob Storage account...
View ArticleSQL Server Replication enhancement in SQL Server 2016
Replication is a widely-adopted feature in SQL Server to copy and distribute data and database objects from one database to another and then synchronizing between databases to maintain consistency. In...
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Azure SQL databases in logical servers, elastic pools, and managed instances
Azure SQL Database is a Database as a Platform service designed for applications that will use database as self-contained service. Databases can be grouped together to simplify management options or...
View ArticleComparing performance of data access libraries using StackExchange/Dapper...
One of the most important questions that you need to answer in your projects is what data access library you should use to access your data in SQL Server database. One of the benchmarks that you can...
View ArticleSQL Server Replication enhancement in SQL Server 2016
Replication is a widely-adopted feature in SQL Server to copy and distribute data and database objects from one database to another and then synchronizing between databases to maintain consistency. In...
View ArticleComparing performance of data access libraries using StackExchange/Dapper...
One of the most important questions that you need to answer in your projects is what data access library you should use to access your data in SQL Server database. One of the benchmarks that you can...
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“What are you waiting for?” – Introducing wait stats support in Query Store
Troubleshooting waits previously. Nobody likes to wait. SQL database is multithreaded system that can handle thousands of queries executed simultaneously. Since queries that are executed in parallel...
View ArticlePublic Preview of Compatibility Level 140 for Azure SQL Database
Today we are announcing the official public preview of compatibility level 140 in Azure SQL Database. Compatibility level 140 enables the following query optimizer changes: A trivial plan referencing...
View ArticleMonitoring automatic tuning actions using XEvents
SQL Server 2017 can automatically tune your queries by identifying and fixing SQL plan change regressions. SQL Server tracks last known good plans for each query, and if the plan for the query changes,...
View ArticleDemo: Identify and fix plan change regression in SQL Server 2017 RC1
Plan change regression happens when SQL Database changes a plan for some T-SQL query, and the new plan has the worse performance than the previous one. SQL Server 2017 has Automatic Tuning feature that...
View ArticleDefault compatibility level 140 for Azure SQL databases
As of this writing, the default compatibility level for new databases created in Azure SQL Database is 130. Very soon, we’ll be changing the Azure SQL Database default compatibility level for newly...
View ArticleAnnouncing preview of Machine Learning Services with R support in Azure SQL...
Today we are announcing the preview of Machine Learning Services with R support in Azure SQL Database! You can evaluate this preview functionality in any server/database created in the West Central US...
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