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45 Best Difference In SQL - [SQL Server 2016 vs. 2017 vs. SQL Server 2018]

What's new in SQL Server 2016, 2017 and 2018?

Top 7 Features Added in the SQL Server 2016 -
1.    Query Store
2.    Polybase
3.    Stretch Database
4.    JSON Support
5.    Row Level Security
6.    Always Encrypted
7.    In-Memory Enhancements
Query Store 

Microsoft is maintain query store upgrading most of all versions  but  What happen in this version?

Actually In this version Microsoft trying to maintains a history of query execution plans with query performance and quickly queries etc.

















PolyBase

Microsoft is introduced Polybase,  This is data processing technique that is called SQL Server connector.

This SQL connector provide the connectivity to Azure Blob Storage and Hadoop using database tables query and Its dealing to a lot of large text files.

Stretch Database

In this section, Microsoft is trying to reduce your storage cast by a hybrid feature that is called Stretch Database.
















JSON Support

JSON Support Is very awesome features,  Using this features you can direct querying to Hadoop, SQL Server 2016 and also support to Lingua Franca.

Row Level Security

The SQL Server 2016 provide row-level security. It's very useful for multi tenant environments and Its provide the limit to access the data based on role etc.


Always Encrypted

 The SQL Server 2016 has feature to supported both column level encryption and encryption in transit as well. 

The Always Encrypted mechanism provided a easy way to encryption to data and makes much better security.













In-Memory Enhancements
This feature already introduce in SQL Server 2014 but it has some limitation over data and issues like no-locking-issues and high-volume-session state issues.

Now in SQL Server 2016, Fixed the issues and trying to improved memory mgmt and Its also supporting foreign keys, check and unique constraints and parallelism also.












What's new in SQL Server 2017? - SQL Server 2017 Features -

1.     Added IDENTITY_CACHE option for ALTER DATABASE SCOPED CONFIGURATION
2.     Added Automatic database tuning
3.     Added graph database capabilities for handling many-to-many relationships
4.     Added CLR strict security - by default is Enabled and Its treats as SAFE and EXTERNAL_ACCESS. When it enabled is true, the PERMISSION_SET option in the CREATE and ALTER ASSEMBLY statements is ignored at run-time.
5.     Added SSIS Catalos for a new global property to specify the default mode for executing SSIS package
6.     Added Object level security to secure the metadata of tabular models
7.     Now supported Cross database transactions
8.     Added New dynamic management views  -
a.     sys.dm_db_log_stats,
b.      sys.dm_tran_version_store_space_usage,  
c.      sys.dm_db_log_info,
d.     sys.dm_db_stats_histogram and
e.     sys.dm_os_host_info
9.     In-memory enhancements - JSON functions, CROSS APPLY operator and so on.
10. Added some string functions- CONCAT_WS, TRANSLATE, and TRIM, WITHIN GROUP and STRING_AGG
11. Added bulk access for CSV files and Azure Blob files
12. Added sys.fn_builtin_permissions
13. Added 1400 Compatibility level for tabular models
14. Added DAX IN operator for specifying multiple value

What's new in SQL Server 2018? - Upcoming SQL Server 2018 Features -
1.     Added TSA-Grade Security
2.     Added Table level security, restricts, user permissions on table data and table names
3.     Self-Destructing Transactions
4.     Indirect Checkpoint Performance Improvements
5.     Edible Result Sets
6.     Renaming SQL Server Agent to Cortana
7.     Full text search, now available for all supported Linux
8.     Online index build and rebuild support for non-clustered column-store indexes
9.     Added New SSMS
10. Added Scented Error Messages
11. Eventual Consistency
12. Added Duraflame Transaction Log
13. Access Storage Engine
14. Added MAIM command
15. Added Twitch Tntegration for Video Replay
16. Azure Power Enterprise Server
17. New DAX IN function
18. Clustered Columnstore Indexes now support LOB columns (nvarchar(max), varchar(max), varbinary(max))
19. Added New string functions CONCAT_WS, TRANSLATE and TRIM
20. Full support for JSON functions
21. Database Engine - New compatibility level 140
22. Enhancements to In-Memory Tables & SPs
23. Added sp_spaceused, sp_rename, CASE, TOP (N) WITH TIES
24. And So On..

Reference - https://docs.microsoft.com/en-us/sql/sql-server/what-s-new-in-sql-server-2017

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