Have you ever been in a situation where you've got to clear down some data within a database that's chock filled with constraints but don't desire to wipe out your precious relationships, indices and all that other jazz?

I found myself in a similar situation earlier this week, and required a clear-down script that might wipe out all of the data within a whole database, without being bothered by any existing constraints. Here it is.
    USE @YourTable;  
    EXEC sp_MSForEachTable "ALTER TABLE ? NOCHECK CONSTRAINT ALL"  
    EXEC sp_MSForEachTable "DELETE FROM ?"  
    EXEC sp_MSForEachTable "ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL"  
    GO  

The script itself takes advantage of an undocumented stored procedure within SQL Server called sp_MSForEachTable that will actually iterate through all of the tables within a given database.

Now that we know we are going to be looping through each of the tables within the specified database, let's see what is going to happen to each of the tables.

ALTER TABLE ? NOCHECK CONSTRAINT ALL
This will disable any constraint checking that is present on the table (so, operations like deleting a primary key or a related object won't trigger any errors).

DELETE FROM ?
This will delete every record within the table.

ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL
This re-enables the constraint checking, bringing your table back to its original state, sans data.

It is very important that you properly scope this query to the table that you are targeting to avoid any crazy data loss. While I don't think that you could just leave that out and execute on master, I wouldn't want to even risk testing that out (although feel free to try it out and let me know if it nukes everything).

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In this article, let me show you how to setup Node.js proxy configurations on Windows. It is often required to work with Node.JS and NPM package installer behind the proxy. When trying to install npm packages behind the proxy, you may come across the error, given below:

To resolve exceptions, shown above, http_proxy and https_proxy configurations needs to be done for NPM. The step by step guidance is given below to perform the configuration on Windows machine.

• Go to C:\User\{User} directory.
• If .npmrc file exists then open it in notepad editor else create .npmrcfile.
• Add the lines, given below to the file for your valid AD domain user. proxy=http://domain\\username:password@ip:port
• Add the lines, given below for Non AD user proxy=http://username:password@ip:port
• Save .npmrc file
• Try to use npm install now. It should work without any error.

The sample contents of .npmrc file are shown below:

In this post you will learn how to resolve dotnet not getting installed error in Windows Server 2012. For the first time when I faced this issue, it took a long time for me to troubleshoot it. So when you try to install .NET Framework 3.5 features using Add or Remove features in Server Manager of Windows Server 2012, You may get the following error.

Here are the steps to resolve this issue:

Firstly, mount DVD or ISO image of OS on Windows Server on which you are trying to install .NET Framework 3.5.

Open Server Manager Console, Go to Manage and Add or Remove features and select .NET Framework 3.5 and click next.

And now you will see the following screenshot and at bottom of the screen you can see the option which states “specify an alternate source path”.

After clicking on Specify Alternate Source Path, give the path of DVD or ISO like the following and make sure you give exact path and click OK.

For eg: If your DVD drive is D drive as mine then the path should be the following,

D:\sources\sxs

After clicking OK click install and your installation should get completed without any error.

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In this post, I will tell you about the LAG and LEAD functions in SQL Server. These two functions are analytical functions in SQL Server. In actual scenarios we need to analyze the data, for example, comparing previous sales data.

The Lag and Lead functions support the window partitioning and ordering clauses in SQL Server. The Lag and Lead functions do not support the window frame clause.

LAG
The Lag function gives the previous column values based on ordering.

LEAD
The Lead function gives the next column values based on ordering.

Demo
    CREATE TABLE DBO.SALES 
    ( 
    PROD_ID INT , 
    SALES_YEAR INT, 
    SALES_AMOUNT INT  
    ) 

    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(1,2009,10000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(1,2010,9000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(1,2011,8000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(1,2012,7000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(1,2013,14000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(1,2014,18000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(1,2015,15000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(2,2013,12000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(2,2014,8000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(2,2015,16000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(3,2012,7000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(3,2013,8000) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(3,2014,9700) 
    INSERT INTO DBO.SALES(PROD_ID,SALES_YEAR,SALES_AMOUNT) VALUES(3,2015,12500) 

    SELECT * FROM DBO.SALES

The following example shows the Previous Year Sales Amount.
SELECT *, LAG(SALES_AMOUNT) OVER(ORDER BY PROD_ID ,SALES_YEAR) [Prevoius Year Sales] FROM DBO.SALES

The following example shows the Next Year Sales Amount.
    SELECT * , 
    LEAD(SALES_AMOUNT) OVER(ORDER BY PROD_ID ,SALES_YEAR) [Next Year Sales]  
    FROM DBO.SALES 

The following example shows the Previous Year Next Year Sales Amount using the partition by clause.
    SELECT *, 
     
       LAG(SALES_AMOUNT) OVER(PARTITION BY PROD_ID ORDER BY PROD_ID ,SALES_YEAR) [PREVOIUS YEAR SALES] , 
       LEAD(SALES_AMOUNT) OVER(PARTITION BY PROD_ID ORDER BY PROD_ID ,SALES_YEAR) [NEXT YEAR SALES]  
    FROM DBO.SALES     

The following example shows an offset other than 1.

The offset is by default 1. If we want an offset other than 1 then we need to provide 2 argument values in the Lag and Lead functions.
    SELECT * , 
       LAG(SALES_AMOUNT,2)  OVER(ORDER BY PROD_ID ,SALES_YEAR) [PREVOIUS YEAR SALES] , 
       LEAD(SALES_AMOUNT,2)  OVER( ORDER BY PROD_ID ,SALES_YEAR) [NEXT YEAR SALES]  
    FROM DBO.SALES 

The following example shows replacing the null with various values:

    SELECT * , 
       LAG(SALES_AMOUNT,2,0)  OVER(ORDER BY PROD_ID ,SALES_YEAR) [PREVOIUS YEAR SALES] , 
       LEAD(SALES_AMOUNT,2,0)  OVER( ORDER BY PROD_ID ,SALES_YEAR) [NEXT YEAR SALES]  
    FROM DBO.SALES 

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In this post I will show you how to Clearing Down A Database Full Of Constraints In SQL Server. Have you ever been in a scenario where you have to clear down some data within a database that is chock full of constraints but don't want to wipe out your precious relationships, indices and all that other jazz?

I found myself in a similar situation earlier this week, and needed a clear-down script that would wipe out all of the data within an entire database, without being bothered by any existing constraints. Here it is.

    USE @YourTable;  
    EXEC sp_MSForEachTable "ALTER TABLE ? NOCHECK CONSTRAINT ALL"  
    EXEC sp_MSForEachTable "DELETE FROM ?"  
    EXEC sp_MSForEachTable "ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL"  
    GO  

What is this doing?
The script itself takes advantage of an undocumented stored procedure within SQL Server called sp_MSForEachTable that will actually iterate through all of the tables within a given database.

Now that we know we are going to be looping through each of the tables within the specified database, let's see what is going to happen to each of the tables.

    ALTER TABLE ? NOCHECK CONSTRAINT ALL
    This will disable any constraint checking that is present on the table (so, operations like deleting a primary key or a related object won't trigger any errors).

    DELETE FROM ?
    This will delete every record within the table.

    ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL
    This re-enables the constraint checking, bringing your table back to its original state, sans data.

Note
It is very important that you properly scope this query to the table that you are targeting to avoid any crazy data loss.

While I don't think that you could just leave that out and execute on master, I wouldn't want to even risk testing that out (although feel free to try it out and let me know if it nukes everything).

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In this article, I am going to tell you how to create a procedure in the real time scenario. A stored procedure is a set of SQL statements, which has been created and stored in the database as an object. Stored procedure will accept the input and output parameters, so that a single procedure can be used over the network by several users, using different input. Stored procedure will reduce the network traffic and increase the performance.

Real time scenario
Step 1: Create a table to describe and create the stored procedure.
    create table Product 
    ( 
          ProductId int primary key, 
          ProductName varchar(20) unique, 
          ProductQty int, 
          ProductPrice float 
    ) 

Step 2: Insert some value to the describe scenario.
    insert product values(1,'Printer',10,4500) 
    insert product values(2,'Scanner',15,3500) 
    insert product values(3,'Mouse',45,500)  

Step 3: Check your table with the inserted value.
    select * from product  

Step 4: Real time scenario is given below:
Create a stored procedure, which is used to perform the requirements, given below:

Before inserting, check the detail about the product name. If the product name is available, update an existing product qty + inserted product qty,

• Before inserting, check the detail about the product name.
  
• If the product name is available, check the product price.
• If the existing product price is less, the inserted product product price replaces the existing product price with the inserted product price.
• If first and second conditions are not satisfied, insert the product information, as new record into the table.

    create procedure prcInsert  
    @id int, 
    @name varchar(40), 
    @qty int, 
    @price float 
    as 
    begin 
     declare @cnt int 
     declare @p float 
     select @cnt=COUNT(ProductId)from Product where pname=@name 
     if(@cnt>0) 
     begin 
      update Product set ProductQty=ProductQty+@qty where ProductName=@name 
      select @p=ProductPrice from Product where ProductName=@name 
      if(@p<@price) 
      begin 
       update Product set ProductPrice=@price where ProductName=@name 
      end 
     end 
     else 
     begin 
      insert Product values(@id,@name,@qty,@price) 
     end 
    end  

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Angular js URL:
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script> 

Html tag:
<div ng-app="myApp" ng-controller="myCntrl"> 
    <table> 
        <thead> 
            <tr> 
                <th> 
                    Emp Code. 
                </th> 
                <th> 
                    Employee Name 
                </th> 
                <th> 
                    Pan No 
                </th> 
                  
            </tr> 
        </thead> 
        <tr ng-repeat="student in EmployeeList"> 
            <td ng-bind="student.StudentID"> 
            </td> 
            <td ng-bind="student.StudentName"> 
            </td> 
            <td ng-bind="student.PanNO"> 
            </td> 
              
        </tr> 
    </table> 
</div> 

Angular js Script :

<script> 
   var app = angular.module("myApp", []); 
   app.controller("myCntrl", function ($scope, $http) { 

       $scope.fillList = function () { 
           $scope.EmployeeName = ""; 
           var httpreq = { 
               method: 'POST', 
               url: 'Default2.aspx/GetList', 
               headers: { 
                   'Content-Type': 'application/json; charset=utf-8', 
                   'dataType': 'json' 
               }, 
               data: {} 
           } 
           $http(httpreq).success(function (response) { 
               $scope.EmployeeList = response.d; 
           }) 
       }; 
       $scope.fillList(); 
   }); 
</script> 

Asp.net Cs page code:
using System; 
using System.Collections.Generic; 
using System.Data.SqlClient; 
using System.Data; 

public partial class Default2 : System.Web.UI.Page 
{ 
protected void Page_Load(object sender, EventArgs e) 
{ 

} 
[System.Web.Services.WebMethod()] 
public static List<Employee> GetList() 
{ 
    List<Employee> names = new List<Employee>(); 
    DataSet ds = new DataSet(); 
    using (SqlConnection con = new SqlConnection(@"Data Source=140.175.165.10;Initial Catalog=Payroll_290716;user id=sa;password=Goal@12345;")) 
    { 
        using (SqlCommand cmd = new SqlCommand()) 
        { 
            cmd.Connection = con; 
            cmd.CommandText = "select EmpId,Empcode, name,PanNo from EMPLOYEEMASTER  order by Name;"; 
            using (SqlDataAdapter da = new SqlDataAdapter(cmd)) 
            { 
                da.Fill(ds); 
            } 
        } 
    } 
    if (ds != null && ds.Tables.Count > 0) 
    { 
        foreach (DataRow dr in ds.Tables[0].Rows) 
            names.Add(new Employee(int.Parse(dr["EmpId"].ToString()), dr["name"].ToString(), dr["PanNo"].ToString())); 
    } 
    return names; 
} 
} 
public class Employee 
{ 
public int StudentID; 
public string StudentName; 
public string PanNO; 
public Employee(int _StudentID, string _StudentName, string _PanNO) 
{ 
    StudentID = _StudentID; 
    StudentName = _StudentName; 
    PanNO = _PanNO; 
} 
}  

Whole HTML page:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %> 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title></title> 
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div ng-app="myApp" ng-controller="myCntrl"> 
    <table> 
        <thead> 
            <tr> 
                <th> 
                    Emp Code. 
                </th> 
                <th> 
                    Employee Name 
                </th> 
                <th> 
                    Pan No 
                </th> 
                  
            </tr> 
        </thead> 
        <tr ng-repeat="student in EmployeeList"> 
            <td ng-bind="student.StudentID"> 
            </td> 
            <td ng-bind="student.StudentName"> 
            </td> 
            <td ng-bind="student.PanNO"> 
            </td> 
              
        </tr> 
    </table> 
</div> 
<script> 
    var app = angular.module("myApp", []); 
    app.controller("myCntrl", function ($scope, $http) { 

        $scope.fillList = function () { 
            $scope.EmployeeName = ""; 
            var httpreq = { 
                method: 'POST', 
                url: 'Default2.aspx/GetList', 
                headers: { 
                    'Content-Type': 'application/json; charset=utf-8', 
                    'dataType': 'json' 
                }, 
                data: {} 
            } 
            $http(httpreq).success(function (response) { 
                $scope.EmployeeList = response.d; 
            }) 
        }; 
        $scope.fillList(); 
    }); 
</script> 
</form> 
</body> 
</html>  

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In this post, let me show you how to fix SQL Server Can't Connect to Local Host. Many times we find issues when connecting to the SQL Server. It gives us the message “SQL Server is not able to connect to  local host” as you can see on the following picture:

To fix this issue:
Go to Start->Run->Services.msc.

Once the Services are open, select SQL Server and start it, as per the given screenshot, given below:

After you do it, SQL server will be up and running again.

SQL Server sometimes stops because of some problem. These steps help to make it up. Thanks for reading.

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In this post, I will show you how to Convert String To Color in SQL Server. The following code will describe how to convert String To Color In SQL Server 2016. And now write code below:

CREATE FUNCTION dbo.fn_conversion_string_color(  

@in_string VARCHAR(200)  

)  

RETURNS NVARCHAR(500)  

AS  

BEGIN  

DECLARE @fsetprefix BIT, -- append '0x' to the output   

@pbinin VARBINARY(MAX), -- input binary stream   

@startoffset INT, -- starting offset    

@cbytesin INT, -- length of input to consider, 0 means total length   

@pstrout NVARCHAR(MAX),   

@i INT,   

@firstnibble INT ,  

@secondnibble INT,   

@tempint INT,  

@hexstring CHAR(16)  

SELECT @fsetprefix = 1,  

@pbinin = SUBSTRING(HASHBYTES('SHA1', @in_string), 1, 3),  

@startoffset = 1,  

@cbytesin = 0   

-- initialize and validate   

IF (@pbinin IS NOT NULL)   

BEGIN    

SELECT @i = 0,   

@cbytesin = CASE  WHEN (@cbytesin > 0 AND @cbytesin <= DATALENGTH(@pbinin))  

  THEN @cbytesin  

  ELSE DATALENGTH(@pbinin)  

  END,   

@pstrout =  CASE  WHEN (@fsetprefix = 1)  

  THEN N'0x'  

  ELSE N''  

  END,   

@hexstring = '0123456789abcdef'   

--the output limit for nvarchar(max) is 2147483648 (2^31) bytes, that is 1073741824 (2^30) unicode characters   

IF (  

((@cbytesin * 2) + 2 > 1073741824)  

OR ((@cbytesin * 2) + 2 < 1)  

OR (@cbytesin IS NULL )  

)   

RETURN NULL   

IF (  

( @startoffset > DATALENGTH(@pbinin) )  

OR (@startoffset < 1 )  

OR (@startoffset IS NULL )  

)   

RETURN NULL   

-- adjust the length to process based on start offset and total length   

IF ((DATALENGTH(@pbinin) - @startoffset + 1) < @cbytesin)   

SELECT @cbytesin = DATALENGTH(@pbinin) - @startoffset + 1   

-- do for each byte   

WHILE (@i < @cbytesin)   

BEGIN   

-- Each byte has two nibbles  which we convert to character   

SELECT @tempint = CAST(SUBSTRING(@pbinin, @i + @startoffset, 1) AS INT)   

SELECT @firstnibble = @tempint / 16   

SELECT @secondnibble = @tempint % 16   

-- we need to do an explicit cast with substring for proper string conversion.     

SELECT @pstrout = @pstrout +   

  CAST(SUBSTRING(@hexstring, (@firstnibble+1), 1) AS NVARCHAR) +   

  CAST(SUBSTRING(@hexstring, (@secondnibble+1), 1) AS NVARCHAR)   

SELECT @i = @i + 1   

END   

END   

RETURN  '#' + UPPER(RIGHT(@pstrout, 6))  

 END  

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