Prevent the insertion of duplicate records

Question

I want to prevent the insertion of duplicate records,if the record is already exists then I want to send a message the record already exists.

please find the below file,It contains my database image.

I want to insert the data through regid,diffrent users can enter the same data but when the same user trying to enter same record 2 time then I should prevent.
In the below picture I rounded with blue(Regid:45),the user can able to enter like that but when the user is trying to enter same details with same regid(45) then I should restrict.Can any one tell me how to write the code for this

Usha Raj · Answer

By using the stored procedure I can't able to insert the duplicate record but while inserting duplicate executing all the steps and it showing record inserted sucessfully but the duplicate record is not inserting in table even though am getting successful message but while inserting the duplicate record instead of executing all the steps in front end I need to pass the message like record alredy eixts ..Can any one tell me how to do like this?

Syed Shanu · Answer

Create a Stored procedure and Check before insert . Here is sample Stored procedure Create PROCEDURE [dbo].[USP_YOURINSERT] ( @JOBTitle VARCHAR(30) = '' @RegID VARCHAR(20) = '' @RequirementID VARCHAR(50) = '' @ReuiredExp VARCHAR(50) = '' @JobLocation VARCHAR(50) = '' @rowNum INT =0 ) AS BEGIN IF NOT EXISTS (SELECT * FROM YOURTABLENAME WHERE JOBTitle=@JOBTitle and RegID=@RegID ) BEGIN INSERT INTO [YOURTABLENAME] (JOBTitleRegIDRequirementIDReuiredExpJobLocationrowNum) VALUES (@JOBTitle@RegID@RequirementID@ReuiredExp@JobLocation@rowNum) GOTO S1_RTN Select 'inserted' END ELSE BEGIN Select 'JobTitle Exists' END END You can check my Article with similar Example. http://www.c-sharpcorner.com/UploadFile/asmabegam/insert-select-update-delete-in-Asp-Net-with-simple-login/

Khargesh Rajput · Answer

before insert record execute a query select id from tbl where title=@title if it returns record>0 then message 'record allready exists else insert record'