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Query Optimizer Improvements in SQL Server 2016
While the last two versions of SQL Server focused on improving performance by offering new features, SQL Server 2016 looks inwards towards improving existing functionality.
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NOLOCK is Broken in SQL Server 2014 SP1
The NOLOCK directive was broken in Cumulative Update #6 for SQL Server 2014 SP1. As a result, databases that relied on that directive may experience unexpected blocking and/or deadlocks.
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SQL Server Now Offers NoSQL Style Memory-Optimized Tables
SQL Server 2016 is removing a lot of the limitations on memory-optimized tables including the inability to work with the large documents favored by NoSQL style designs.
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R for SQL Server 2016
SQL Server is add support for the statistical programming language R.
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SQL Server 2016: Identify Regressions with Query Store
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.
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SQL Server 2016: Dynamic Data Masking
Data masking is a necessary, but error prone process. You only need to forget the mask one time to leak sensitive data. SQL Server 2016 attempts to address this with a feature called Dynamic Data Masking.
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SQL Server 2016: Always Encrypted
SQL Server 2016 seeks to make encryption easier via its new Always Encrypted feature. This feature offers a way to ensure that the database never sees unencrypted values without the need to rewrite the application.
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SQL Server 2016: Temporal Tables
SQL Server 2016’s new Temporal Table feature makes it easy to work with data that needs to be versioned.
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SQL Server 2016: Stretch Database
SQL Server 2016’s new stretch database feature promises to offer local server performance for hot data and cloud storage for old data without any change to the application.
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SQL Server 2016: Natively Compiled Functions
In SQL Server 2014 we saw the introduction of Natively Compiled Stored Procedures. In 2016 we’ll be able to do the same for Scalar User Defined Functions.
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SQL Server 2016: Memory Optimized Tables Made Easier
Memory Optimized Tables promise significant performance gains, but tend to be difficult to work with. SQL Server 2016 reduces much of the pain by offering ALTER TABLE support.
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SQL Server 2016: Clustered Columnstore Index Enhancements
Clustered Columnstore Indexes were one of the two headline features for SQL Server 2014. Designed for tables with over 10 million rows, they allow for good performance on analytical queries without the need to explicitly specify indexes. With SQL Server 2016, they gain the ability to support secondary indexes.
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SQL Server 2016: Updatable, Non-Clustered Columnstore Indexes
Non-clustered Columnstore Indexes are also getting some enhancements in SQL Server 2016. The most notable of these enhancements is the ability to be updated.
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SQL Server 2016: In-Memory Columnstore Indexes
New for SQL Server 2016 is the ability to place a Columnstore Index on an In-Memory Table.
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