Handle Devide By Zero Error

Hi ..
set Arithaboth and Ansi_Warnings as OFF to handle devide by Zero or any kind of arithmatic errors

SET ARITHABORT OFF
SET ANSI_WARNINGS OFF
Declare @Denominator int =0
Declare @Numerator int =5
SELECT isnull(@Numerator / @Denominator,0) as Result

happy coding....

Improve Performance by using OUTPUT in Insert Or Update Statement in single query

Hello friends,

recently I needed to fire a single SQL statement for Insert and Update and using the single statement I also needed to return the result of all Inserted/Updated Records details..

after searching a lot ... I came to know a very interesting way to perform both statement in single Query.

Generally for the scenario I got lots of suggestions to use Stored Procedure, but which was difficult for my scenario.

so I must get solution for it.

ok ok... let's come to point.

let's we have created a sample Table using the query

Create Table Table_1(Id Int Identity,Name nvarchar(100))

to insert records and get its generated Id
basically we perform like this

Insert into Table_1(Name) 
Select 'Sandeep'
Select @@IDENTITY

and same way for update
here the Updated value comes from other process which is not available Directly
[My case is only For Insert. but the concept we can use in Update also]

Declare @NewValue nvarchar(100)='Sandeep Prajapati'
Declare @ID int=1

Update Table_1
set Name=@NewValue
Where Id=@ID

select @ID as ID,@NewValue as Name

Now We can use OUTPUT key word to select the inserted/Updated Value to get affected rows in single query which also helps to improve performance.

Here is query for Insert

Insert Into Table_1(Name)
OutPut Inserted.Id,Inserted.Name
values('Sandeep')

after execution of the query the output is

 

Same way for Update

Update Table_1
set Name='Sandeep Prajapati'
OutPut inserted.ID,inserted.Name

Hope this helps...

Happy Coding...

Sample for WCF using json

Here is a sample for start WCF using json
in aspx page

  <script type="text/javascript">
        function ajaxService2() {
            serviceUrl = "http://localhost/WCFS/Service1.svc/GetData";
            var time = new Object();
            time.value = "1";
            $.ajax({
                type: "POST",
                url: serviceUrl,
                data: JSON.stringify(time),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (transport) {
                    var string = transport;
                    $("#<%= Text2.ClientID %>").val(string);
                },
                error: function (ex) {
                    alert("error" + ex.responseText);
                }
            });
        }

        function ajaxService1() {
            serviceUrl = "http://localhost/WCFS/Service1.svc/GetAllProducts";
            $.ajax({
                type: "GET",
                url: serviceUrl,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (transport) {
                    var string = transport;
                    $("#<%= Text1.ClientID %>").val(string);
                },
                error: function (ex) {
                    alert("error" + ex);
                }
            });
        }
    </script>
    <h2>
        Welcome to ASP.NET!
    </h2>
    <p>
        <p>
            <input id="Button2" onclick="ajaxService1()" value="Ajax call service 1" type="button">
            <asp:textbox id="Text1" runat="server" />
        </p>
        <p>
            <input id="Button3" onclick="ajaxService2()" value="Ajax call service 2" type="button">
            <asp:textbox id="Text2" runat="server" />
        </p>
    

Web.config Settings for WCF and json in WCF’s Web.config

<?xml version="1.0"?>

<configuration>
    <system.web>
        <compilation debug="true" targetFramework="4.0" />
    </system.web>
    <system.serviceModel>
        <services>
            <service name="WCFS.Service1">
                <endpoint
                address="" binding="webHttpBinding"
                behaviorConfiguration="EndBehave"
                contract="WCFS.IService1"/>
            </service>
        </services>
        <behaviors>
            <endpointBehaviors>
                <behavior name="EndBehave">
                    <webHttp/>
                </behavior>
            </endpointBehaviors>
            <serviceBehaviors>
                <behavior>
                    <serviceMetadata httpGetEnabled="true"  />
                    <serviceDebug  includeExceptionDetailInFaults="false" />
                </behavior>
            </serviceBehaviors>
        </behaviors>
        <serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true" />
    </system.serviceModel>
    <system.webServer>
        <modules runAllManagedModulesForAllRequests="true"/>
    </system.webServer>
</configuration>

in WCF Interface

 // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
    [ServiceContract]
    public interface IService1
    {

        [OperationContract]
        [WebInvoke( ResponseFormat = WebMessageFormat.Json, Method = "POST", BodyStyle = WebMessageBodyStyle.WrappedRequest)]
        string GetData(int value);

        [OperationContract]
        CompositeType GetDataUsingDataContract(CompositeType composite);

        [OperationContract]
        [WebInvoke(UriTemplate = "/GetAllProducts", ResponseFormat = WebMessageFormat.Json, Method = "GET")]
        List<product> GetAllProducts();
        // TODO: Add your service operations here
    }


    [DataContract]
    public class Product
    {
        [DataMember]
        public int ProdId { get; set; }
        [DataMember]
        public string PropName { get; set; }
        [DataMember]
        public int Quantity { get; set; }
        [DataMember]
        public int Price { get; set; }
    }

    // Use a data contract as illustrated in the sample below to add composite types to service operations.
    [DataContract]
    public class CompositeType
    {
        bool boolValue = true;
        string stringValue = "Hello ";

        [DataMember]
        public bool BoolValue
        {
            get { return boolValue; }
            set { boolValue = value; }
        }

        [DataMember]
        public string StringValue
        {
            get { return stringValue; }
            set { stringValue = value; }
        }
    }

Service Class

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] 
    public class Service1 : IService1
    {
        public List<product> GetAllProducts()
        {
            return new List<product>
            {
                 new Product() {ProdId=101,PropName="Laptop",Quantity=200,Price=45000},
                 new Product() {ProdId=102,PropName="Desktop",Quantity=300,Price=35000},
            };
        }
        public string GetData(int value)
        {
            return string.Format("You entered: {0}", value.ToString());
        }

        public CompositeType GetDataUsingDataContract(CompositeType composite)
        {
            if (composite == null)
            {
                throw new ArgumentNullException("composite");
            }
            if (composite.BoolValue)
            {
                composite.StringValue += "Suffix";
            }
            return composite;
        }
    }

Happy Coding….

Set Default Value as Function to column of a Table

Hello,
Generally we need to set default value to particular column in Database Table like isActive is true, IsDeleted is false.
same way many times we set CreatedOn Date as CurrentDate and that is by query of insert GetDate().
Static Values :
Its very easy to set some static value as Default value for column and that is as follow :


Functions :
Set Default Date for Createdon Field as Follow :

User Defined Functions :
Set User Defined function as Default Value as follow:
In my case I am supposed to get Random Hexa Code for Color. so I Have created an User Defined function for that

CREATE FUNCTION [dbo].[GetRandomColorCode]
( 
)
RETURNS varchar(6)
AS
BEGIN
Declare @Color varchar(6)
 RETURN (SELECT MyNewID FROM dbo.MyNewID)
END

Now set the function in columns as follow :





If this do not allow us to set Default value try following query to set

ALTER TABLE dbo.Table_1 ADD CONSTRAINT
 DF_Table_1_ColorCode DEFAULT ([dbo].[GetRandomColorCode]()) FOR ColorCode
GO

All the best



Happy Coding..

Second Highest Salary- Sql Query

Create Table #Emp(id int identity primary key,
    Emp varchar(100),
    Salary int)

insert into #Emp
select 'XXXX',17000 union all
select 'DDDD',21000 union all
select 'WWWW',30000 union All
Select 'HHHH',21000 union All
select 'CCCC',30000 union All
Select 'TTTT',21000 union All
SElect 'PPPP',21000

select * from #Emp

select #Emp.* 
from (select ROW_NUMBER() over (order by salary desc) as RowNumber, Salary
   from #Emp
    group by Salary) as tempEmp inner join #Emp on tempEmp.Salary = #Emp.Salary
   where tempEmp.RowNumber=2

Drop Table #Emp

Data Will Look like this



Output will be like this