This time we will follow a complete and a smart way to create a HTTP server that is exact and quick in Node.js.

Express is insignificant and adaptable Node.JS web application framework that gives a vigorous set of gimmicks of web and portable application. What's more, it will help you in making APIs that verifiably take a shot at the HTTP protocol.

Installation
Express.JS is a framework file hosted by the Node Package Manager (NPM). For installation, we have a special node command to install on the local computer. Write the following code:
npm install [PACKAGE NAME]

And this is code for installing express:
node install express

Note: express is the package name.

After Installing, you will get a folder node_modules that consists of all the modules that you install from npm.

Finally, you have successfully installed the express module in your node folder. Now, write the following code:
// Express
var fs=require("fs");
var host="127.0.0.1";
var port="1337";

//Express
var express=require("express");
var app=express();
app.ger("/",fuction(request, response){
  response.send("Express is Working !!");
});

//Listening Socket
app.listen(port,host);

We utilize the term standard code with express on the grounds that it evacuates the undesirable lines. The code that minimizes the lines of code to do a certain task.  Also, express permits us to make a HTTP server in a couaple of lines of code. And here is the output:

I hope it works for you!

HostForLIFE.eu Node.js Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

AngularJS Introduction

AngularJs is an open source Javascript framework to organise and assist web applications and single page applications. In 2012 we witnessed rise of Javascript MVC frameworks and libraries including Backbone.js , Ember.js and Angular.js.

AngularJS is created by Google to build single page applications which could be more architectured and maintainable. AngularJS is completely client-side and entirely JavaScript, so wherever Javascript runs AngularJS also runs. It is even less than 29kb making it highly minified and compressed. Angular is the next generation framework , in which every tool is designed such that it works with every other tool in an interconnected way.

Interesting Point Using AngularJS

Angular has some compelling features for not just the developers but for designers as well.

Two Way Data Binding
It is the most crucial and useful feature of Angular. This feature is what all modern web apps are all about i.e Real Time. Two way binding permanently binds the view to the model and reduces refresh cycles, it also saves a considerable amount of code as previously 80% of code was dedicated to manipulating, traversing and listening to DOM . With data binding this code disappears and hence more concentration can be laid to application. Normally with change in model the DOM elements and attributes need to be manually manipulated to reflect the changes, it proves to be a complex process mainly when application grows in complexity and in size. But with two way data binding the synchronization between the DOM and the model is well taken care of.

HTML Template
AngularJS doesn’t rely on any rendering engine but uses browser parseable .html files for its partials. The HTML templates are parsed by the browser in the DOM. The DOM is now the input to the AngularJS compiler . Angular then traverses the DOM template for rendering called the Directives. The input here is bowser DOM and not the HTML string , this is the noticeable change between angular and all fellow frameworks.

Directives
Directives are stand alone reusable elements separated from the app . All DOM manipulations are performed by Directives. Directives are used to create custom HTML tags to serve as new custom widgets .With Directive you can create a new HTML tag or attribute and make it do anything you want . Directives are very unique, useful, powerful and reusable feature available only in angular. With Directives you can invent new HTML syntax that are specific to your application.

Dependency Injection
Dependency Injection is an angular feature that enables developers to easily build, develop, test and manage applications . With this feature you merely ask for for the dependencies instead of making manually , it will provide you an instance for any service asked provided you add the service as a parameter to get access to this service.

Testing
AngularJS is designed by keeping testability in mind such that angular applications can be tested easily as any Javascript code comes with a strong set of tests . Angular comes with a end to end test runner setup .

Why Use AngularJS?

AngularJS is a new Javascript framework by Google and is designed to make front end development easier . The popularity of single page applications and angular is flaming. Angular provides numerous concepts to to organize and manipulate the web applications.

Enabling a Parallel Workflow
It enables a parallel workflow between designers and developers. For a project both designing and hard coded developing can go side by side. For a project that is estimated to be completed in 4 months then by following the traditional sequential approach there would be dedicated 4 months of design followed by 4 months of coding making it 8 months altogether. But XAML allows to work in parallel by agreeing upon an interface for a screen. Developers can work on grabbing the data and writing all properties and tests around them while designers can animate and manipulate until they reach their final desired design . Those not familiar with XAML it is a declarative XML based language to instantiate object graphs and set values. The reason XML became so popular is because they translate well to angular.

Handling Dependencies
AngularJS easily handles dependency injections , angular lets you divide your app into modules that are initialized separately and having dependencies on each other. This enables you to test only the modules you want at once while also unfolding the ability to create end to end tests as well.

Dynamic loading is used by single page applications to deliver native app feel, but it involves a lot of dependencies on various modules and services, angular organises these and even manages the lifetime of an object for you.

Declarative UI
Having a declarative UI has many advantages associated with it. A structured UI is always easier to understand and manipulate. Without ,then by mere looking at the markup it can’t be figured what UI will actually do. So its not apparent whether any translations and validations are taking place by looking at some form tags.

But by declaring UI and by directly placing markup in HTML one can understand the extended markup angular provides. It makes it clear where and to what data is being bound to. With added tools like filters and directives the intent of UI is much clearer.

Development <-> Design Workflow
This works very well with angular, markup can be added without breaking an application as it depends on a particular structure or id to locate element and do task. Even rearrangement of code is much easier as the corresponding code that binds with it also moves along.

Flexibility with Filters
Filters are standalone functions and filter the data before reaching the view, it can involve formatting decimal places or reversing an array or simply implementing pagination. Filters are separate from app just like directives and are so resourceful that creation of a sorted HTML table is possible with filters without writing any Javascript.

These fundamental features and principles will let you create a performance driven, maintainable , extensible and efficient front end codebase . AngularJS provides a rich experience to the end user, it is a robust and well maintained Javascript framework suitable for any professional web development.

One of the benefits and uses of Filtered Indexes in SQL Server is to produce filtered uniqueness. clearly this has some implications, thus please perceive what you are making an attempt to accomplish. In the below example, we've a compound natural key of the 2 fields key1 and key2. the field bit1 isn't a member of the natural key, however will inform us as to some table usage. maybe bit1 indicates that this record is Active (1) or Inactive (0), or whether or not the info is Confirmed (1) or unconfirmed  (0), or Deleted (0) or Not Deleted (1).

In any case, we have a tendency to solely wish to enforce uniqueness for when bit1 = 1, that indicates:
This value is often filtered to be used wherever bit1 = 1
We do not care whether or not there are duplicate records for once bit1 = 0.
In this means, you'll "deactivate" (in business terms) a record by setting bit1 = 0, while not violating your natural key's uniqueness on (key1, key2).
drop table dbo.tabletestdups
go
create table dbo.tabletestdups
( key1 int not null
, key2 int not null
, bit1 bit not null
)
go
create unique nonclustered index idx_nc_u_f_tabletestdups_key1_key2_bit1 on dbo.tabletestdups (key1, key2, bit1)
go
insert into dbo.tabletestdups (key1, key2, bit1) values (1,1,1) –succeed
insert into dbo.tabletestdups (key1, key2, bit1) values (2,2,1) –succeed
insert into dbo.tabletestdups (key1, key2, bit1) values (3,3,1) –succeed
insert into dbo.tabletestdups (key1, key2, bit1) values (1,1,0) –succeed
insert into dbo.tabletestdups (key1, key2, bit1) values (2,2,0) –succeed
insert into dbo.tabletestdups (key1, key2, bit1) values (3,3,0) –succeed
go
insert into dbo.tabletestdups (key1, key2, bit1) values (1,1,1) –fails
go
insert into dbo.tabletestdups (key1, key2, bit1) values (1,1,0) –fails
go
drop index idx_nc_u_f_tabletestdups_key1_key2_bit1 on dbo.tabletestdups
go
create unique nonclustered index idx_nc_u_f_tabletestdups_key1_key2_bit1 on dbo.tabletestdups (key1, key2, bit1) WHERE bit1 = 1 --Note the important WHERE clause here at the end of the index.
go
insert into dbo.tabletestdups (key1, key2, bit1) values (1,1,1) –fails
go
insert into dbo.tabletestdups (key1, key2, bit1) values (1,1,0) --succeeds because the unique constraint only enforces bit1 = 1.
go
select * from dbo.tabletestdups

And here is the output:

Note that rows four and seven have allowed duplicate combination of key1 =1, key2= 1 and bit1 = 0, but that previous attempts to insert a duplicate combination of key1 =1, key2= 1 and bit1 = 1 unsuccessful.

HostForLIFE.eu SQL Server 2014 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

There are some condition &amp; times once SQL Server CPU usage exceeds threshold value (ex 80th or more) and keep constant even until 100 percent for a undefined duration. A DBA don't get notified mechanically concerning performance degrade till its according by application team or service desk.

This typically happens once all in explosive unannounced application work goes to SQL Server for processing; but at smart range of times, it’s as a result of some T-SQL Queries are taking longer than expected or as a result of bad execution plan or block. There is also a lot of reason to add, but ultimately high processor usage on production systems goes to harm performance.

Given below could be a script that you simply will convert into stored procedure and call from SQL Server agent job, regular for each five minutes or additional to ascertain CPU usage on a vital info server. This script uses sys.dm_os_ring_buffers to spot CPU usage from last five minutes and if average CPU usage goes beyond 80th then send an alert email together with top 50 CPU consuming SQL sessions and details. And now change the 3rd code line to: SELECT @TimeNow = cpu_ticks / (cpu_ticks/ms_ticks) from sys.dm_os_sys_info

SCRIPT
SET NOCOUNT ON
DECLARE @TimeNow bigint
SELECT @TimeNow = cpu_ticks / convert(float, ms_ticks) from sys.dm_os_sys_info
-- Collect Data from DMV
Select record_id, dateadd(ms, -1 * (@TimeNow - [timestamp]),
GetDate())EventTime, SQLSvcUtilization, SystemIdle,
(100 - SystemIdle - SQLSvcUtilization) AS OtherOSProcessUtilization into #tempCPURecords
from ( select record.value('(./Record/@id)[1]', 'int')record_id, record.value('(./Record/SchedulerMonitorEvent/SystemHealth/SystemIdle)[1]','int')SystemIdle, record.value('(./Record/SchedulerMonitorEvent/SystemHealth/ProcessUtilization)[1]','int')SQLSvcUtilization,
timestamp
from ( select timestamp, convert(xml, record)record
from sys.dm_os_ring_buffers
where ring_buffer_type = N'RING_BUFFER_SCHEDULER_MONITOR'
and record like '%<SystemHealth>%')x )y  order by record_id desc
-- To send detailed sql server session reports consuming high cpu
-- For a dedicated SQL Server you can monitor 'SQLProcessUtilization'
-- if (select avg(SQLSvcUtilization) from #temp where EventTime>dateadd(mm,-5,getdate()))>=80
-- For a Shared SQL Server you can monitor 'SQLProcessUtilization'+'OtherOSProcessUtilization'
if (select avg(SQLSvcUtilization+OtherOSProcessUtilization)
from #tempCPURecords where EventTime>dateadd(mm,-5,getdate()))>=80
begin
print 'CPU Alert Condition Ture, Sending Email..'
DECLARE @tableHTML  NVARCHAR(MAX) ;
SET @tableHTML =
    N'<H1>High CPU Utilization Reported</H1>' +
    N'<H2>SQL Server Session Details</H2>' +
    N'<table border="1">' +
    N'<tr><th>SPID</th><th>Status</th><th>Login</th><th>Host</th><th>BlkBy</th>'+
   N'<th>DatabaseID</th><th>CommandType</th><th>SQLStatement</th><th>ElapsedMS</th>'+
   N'<th>CPUTime</th><th>IOReads</th><th>IOWrites</th><th>LastWaitType</th>'+
N'<th>StartTime</th><th>Protocol</th><th>ConnectionWrites</th>'+
N'<th>ConnectionReads</th><th>ClientAddress</th><th>Authentication</th></tr>'+
CAST ( ( SELECT  TOP 50 -- or all by using *
td= er.session_id,'',
td= ses.status,'',
td= ses.login_name,'', 
td= ses.host_name,'',  
td= er.blocking_session_id,'', 
td= er.database_id,'', 
td= er.command,'', 
td= st.text,'', 
td= er.total_elapsed_time,'', 
td= er.cpu_time,'', 
td= er.reads,'', 
td= er.writes,'', 
td= er.last_wait_type,'', 
td= er.start_time,'', 
td= con.net_transport,'', 
td= con.num_writes,'', 
td= con.num_reads,'', 
td= con.client_net_address,'', 
td= con.auth_scheme,'' 
FROM sys.dm_exec_requests er 
OUTER APPLY sys.dm_exec_sql_text(er.sql_handle) st 
LEFT JOIN sys.dm_exec_sessions ses 
ON ses.session_id =er.session_id  LEFT JOIN sys.dm_exec_connections con 
ON con.session_id = ses.session_id 
WHERE er.session_id > 50 
ORDER BY er.cpu_time DESC ,er.blocking_session_id
FOR XML PATH('tr'), TYPE
)AS NVARCHAR(MAX))+
N'</table>'
-- Change SQL Server Email notification code here
EXEC msdb.dbo.sp_send_dbmail
@recipients='dk@sqlknowledge',
@profile_name = 'SQLProfileName',   
@subject = 'ServerName:Last 5 Minutes Avg CPU Utilization Over 80%',
@body = @tableHTML,
@body_format = 'HTML';
END
-- Drop the Temporary Table
DROP Table #tempCPURecords

HostForLIFE.eu SQL Server 2014 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

In this post, I will tell you how to change primary key column for existing table in MSSQL 2014. First, you must create table User_Details with the code below:

CREATE TABLE [dbo].[Users_Details](
            [Username] [nchar](20) NOT NULL,
            [Password] [nchar](20) NOT NULL,
            [Email] [nchar](30) NULL,
            [Mobile] [nchar](15) NULL,
            [Address] [nchar](100) NULL,
            [USER_ID] [int] IDENTITY(1,1) NOT NULL,
            [Gender] [varchar](15) NULL,
            [Country] [varchar](50) NULL,
    CONSTRAINT [PK_Username] PRIMARY KEY CLUSTERED
    (
            [Username] ASC
    )
    )

And the change the column as
ALTER TABLE Users_details
ALTER COLUMN USERname NVARCHAR(100)

Now, Run it. It will show the error. Because Username column contains Primary Key.
Msg 5074, Level 16, State 1, Line 1
The object 'PK_Username' is dependent on column 'Username'.
Msg 4922, Level 16, State 9, Line 1
ALTER TABLE ALTER COLUMN Username failed because one or more objects access this column.

First Drop the Primary Key Constraint and alter table and add  Primary Key Constraint
ALTER TABLE Users_Details
DROP CONSTRAINT PK_Username
ALTER TABLE Users_Details
ALTER COLUMN Username NVARCHAR(100) NOT NULL
ALTER TABLE Users_Details
DD CONSTRAINT PK_Username PRIMARY KEY(Username)

Hope this tutorial works for you!

HostForLIFE.eu SQL Server 2014 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

Simple ASP Script to send mail using AspEmail

The following is a very basic script to send a mail from an .asp page (we will build on this mail in the next scripting example to retrieve and e-mail information from a form). Note that lines starting ' are explanatory only - these lines are not parsed by the server.

<%

' First Step is to create the AspEmail message object
Set Mail = Server.CreateObject("Persits.MailSender")

' Set the from address - replace value within the quotes with your own
Mail.From = "[email protected]"

' Add the e-mail recipient address - again replace value within the quotes with your own
Mail.AddAddress "[email protected]"

' Set the subject for the e-mail
Mail.Subject = "Test mail via AspEmail"

' Create the body text for the e-mail
Mail.Body = "This mail was sent via AspEmail"

' The mail server requires that we authenticate so supply username and password
Mail.Username = "[email protected]"
Mail.Password = "your_password"

' The e-mail is now ready to go, we just need to specify the server and send
Mail.Host = "smtp.hostforlife.eu"
Mail.Send

' Mail is sent - tidy up and delete the AspEmail message object
Set Mail = Nothing

%>

That's it - you just need to substitute your own values where required and you should be able to copy this script to your account and send your first e-mail.

Note that as we use authentication the 'Mail.From' e-mail address must be a live user on our mailserver and should match the address used for the 'Mail.Username'.

Node.js is an open source, cross-platform runtime environment for server-side and networking applications. Node.js applications are written in JavaScript, and might be run within the Node.js runtime on OS X, Microsoft Windows, Linux and FreeBSD. Node.js provides an event-driven architecture and a non-blocking I/O API that optimizes an application's outturn and measurability. These technologies are normally used for real-time applications.

Node.js uses the Google V8 JavaScript engine to execute code, and an oversized percentage of the fundamental modules are written in JavaScript. Node.js contains a intrinsic  library to permit applications to act as an internet server while not software like Apache HTTP Server or IIS.
var http = require('http');
var fs = require('fs');
http.createServer(function(req, res) {
    var newFile = fs.createWriteStream("x.wmv");
    var fileBytes = req.headers['content-length'];
    var uploadedBytes = 0;
    req.pipe(newFile);
    req.on('data', function(chunk) {
        uploadedBytes += chunk.length;
        var progress = (uploadedBytes / fileBytes) * 100;
        res.write("progress:" + parseInt(progress, 10) + "\n");
    });
    res.write("Done");
}).listen(8888);

HostForLIFE.eu Node.js Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

Not all cipher texts area unit needed to be regenerate back to plain texts. ideal is "passwords". All we want with non reversible encryption is, store them in encrypted format and perform comparison once needed. What's the most effective method of implementing this with MSSQL 2014?

SQL Server provides variety of functions that may be used for encrypting plain texts using totally different mechanisms. Most of the functions enable you to write and so rewrite them back to plain text. Examples for these functions are "ENCRYPTBYKEY" and "ENCRYPTBYCERT". If decryption isn't needed or the requirment is non reversible encryption, then the most effective function to be used is "HASHBYTES".

HASHBYTES returns the hash of given clear text supported the algorithm used. Algorithms supported are: MD2, MD4, and MD5 (128 bits (16 bytes)); SHA and SHA1 (160 bits (20 bytes)); SHA2_256 (256 bits (32 bytes)), and SHA2_512 (512 bits (64 bytes)). SHA2_256 and SHA2_512 available only with SQL Server 2012 and higher than.

Though we've been given several algorithms for this, most of them are vulnerable for many attacks and not thought-about as secured cryptography algorithm. Some of them a number of identified to "collisions" that generate same output for various inputs. If you're using a version before 2012, best is SHA1 even though it's been marked for "collisions". If the version of SQL Server is 2012 or higher than, best is either SHA2_256 or SHA2_512.

Here could be a sample code that shows the usage of HASHBYTES;
-- Creating table
IF OBJECT_ID('dbo.UserCredential', 'U') IS NOT NULL
 DROP TABLE dbo.UserCredential
GO
CREATE TABLE dbo.UserCredential
(
 UserId int identity(1,1) PRIMARY KEY
 , UserName varchar(20) NOT NULL
 , Password binary(64) NOT NULL
)
GO
-- Inserting records
INSERT INTO dbo.UserCredential
 (UserName, Password)
VALUES
 ('Peter', HASHBYTES('SHA2_512', 'Pa$$w0rd'))
 , ('Scott', HASHBYTES('SHA2_512', 'P@$$w0rD'))
-- Checking records inserted
SELECT * FROM dbo.UserCredential;

Since the cipher text cannot be reverted back with HASHBYTES, here is the way of doing the comparison.
-- Validating user
IF EXISTS (SELECT * FROM dbo.UserCredential
   WHERE UserName = 'Peter'
    AND Password = HASHBYTES('SHA2_512', 'P@$$w0rD'))
 Print 'User authenticated'
ELSE
 Print 'Invalid user!'

HostForLIFE.eu SQL Server 2014 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

In this post, I will explain you about Split and convert Comma Separated String. In this article I will explain with example code, how to split and convert a comma separated / delimited string to a table using Split function in SQL Server 2005, 2008, 2012 and MSSQL 2014 versions. The string containing words or letters or numbers separated (delimited) by comma or underscore or  plus(+) ,etc,. are going to be split into Table values.

I will conjointly explain a way to use the Split function to separate a string in an exceedingly SQL query or stored Procedures in SQL Server 2005, 2008 and 2012 versions. And here is the code that I used:
CREATE FUNCTION [dbo].[SplitString] (@InputString NVARCHAR(MAX),@delimiter CHAR(1))
RETURNS @tbl TABLE (
  Item NVARCHAR(50) NOT NULL
)
AS
BEGIN
  DECLARE @StartIndex int,
          @NextIndex int,
          @ItemLen int
  SELECT
    @StartIndex = 0,
    @NextIndex = 1
  WHILE @NextIndex > 0
  BEGIN
    SELECT
      @NextIndex = CHARINDEX(@delimiter, @InputString, @StartIndex + 1)
    SELECT
      @ItemLen =
                CASE
                  WHEN @NextIndex > 0 THEN @NextIndex
                  ELSE LEN(@InputString) + 1
                END - @StartIndex – 1
    INSERT @tbl (Item)
      VALUES (CONVERT(varchar(50), SUBSTRING(@InputString, @StartIndex + 1, @ItemLen)))
    SELECT
      @StartIndex = @NextIndex
  END
  RETURN
END

Now, this is the example 1:
SELECT * FROM [SplitString]('Apple-Dell-HP-Lenovo-Sony','-')

Now, write the example 2:
SELECT * FROM [SplitString]('Apple,Dell,HP,Lenovo,Sony',',')
Here is the output from the code above:

Example code 3:
SELECT * FROM [SplitString]('1,2,3,4,5')

The output of the above code snippet is shown on the following picture:

HostForLIFE.eu SQL Server 2014 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

In this article, I want to explain you about How to Apply IDENTITY Column with SQL Server Memory Optimized Table. Memory Optimized tables were introduced in SQL Server 2014. As we know, memory optimized tables don't support an IDENTITY column. thus however will we produce an INDENTITY (auto incremented) column with a memory optimized table?

And here is the example code:
CREATE TABLE IdentityTest
(
        ID INTEGER IDENTITY(1,1) NOT NULL PRIMARY KEY NONCLUSTERED HASH WITH (BUCKET_COUNT = 100000),
        Name VARCHAR(50) not null
)
WITH (MEMORY_OPTIMIZED = ON)

And this is the result:
Msg 10771, Level 16, State 7, Line 2
The feature ‘identity column’ is not yet implemented with memory optimized tables.

The workaround of an IDENTITY value is to use a SEQUENCE object. A SEQUENCE object (introduced with SQL Server 2012) works equally to an IDENTITY value with massive scope to the IDENTITY. The SEQUENCE object isn't restricted to a column or table however it's scoped to a whole information. one among the benefits of a SEQUENCE object is, it is controlled by application code additionally. This SEQUENCE is shared with multiple tables.

Apply IDENTITY Column with SQL Server Memory Optimized Table
To apply an IDENTITY column in a memory optimized table, you must use a SEQUENCE object. The following are the steps to use a SEQUENCE object as an IDENTITY column with a memory optimized table.

Step 1
Create a memory optimized table and a SEQUENCE object.
--Create memory optimized table
CREATE TABLE IdentityTest
(
        ID INTEGER NOT NULL PRIMARY KEY NONCLUSTERED HASH WITH (BUCKET_COUNT = 100000),
         Name VARCHAR(50) not null
)
WITH (MEMORY_OPTIMIZED = ON)
--Create SEQUENCE object
CREATE SEQUENCE [dbo].[TableNextId]
AS [int]
             START WITH 1000
              INCREMENT BY 1
              MINVALUE  1
              MAXVALUE 10000

Step 2
Use a SEQUENCE object to get following Id using the “NEXT value FOR” operate. SQL Server writes a replacement value within the value in the SEQUENCE to the system table whenever the next value FOR function is called. thus we will catch on filled like an IDENTITY column.
DECLARE @nextId INTEGER = NEXT VALUE FOR [dbo].[TableNextId]]
INSERT INTO IdentityTest VALUES (@nextId, 'my Test')

A memory optimized table doesn't support an IDENTITY (auto incremented) column. however using a SEQUENCE object, we will get an auto incremented value for a numeric data type column.

HostForLIFE.eu SQL Server 2014 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.