how to update a table in sql 2008r2

Hi

Write update query.
Example
Update tablename set username= value,lastname=value,mobile=value,emailid=value.
Value refers to the value you need to update.
You create sqlconnection and in the sqlcommand pass this query and execute it through VB.NET

Thanks & Regards,
Santhi .V

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hello santhi.................
the pblm is how can i define where condition
update table reg set uname-''shankar ,name =''mishra, mob=5565656,emaiid='abc@gmailcom'
and where conditoin???????????????????/

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Hi

There would have been some identity column right.
From where you are Fetching the records?
You will display records on the textboxes by any identity column right.
Just pass that value in where condition.
Can you answer to my question.
You wanted to update the record which is already saved in the database right.

Thanks & Regards,
Santhi .V

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hello santhi
yes column is already is there in database
userid column i define it uniqueidentifier
.........................................on a form user retrieve his/her info after that they want to update it....how can they perform this action??????????????

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Hi

No probs, if you dont have identity column also.
Actually you are updating the column values which is already saved in the database.
So fetch those values and save it in some variables.
Pass those variables in the where condition.
Example:
Update tablename set uname=value,lname=value where mobilenumber='already saved value'
If the mobilenumber is unique you can do like this

Thanks & Regards,
Santhi .V

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see
i have five column
userid as uniqueidentifier
username
lastname
mobile
emailid there is a edit btn
on click button of edit
user can edit theh value already shows in textbox and he/she can update this

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Hi

Fetch that userid column while you are retrieving it.
Pass that column value in where condition.

Thanks & Regards,
Santhi .V

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Hi

For Example:

Fetch all the columns what you need along with the userid.
Select * from tablename
You will display the records in any controls.
string userid = string.empty;(if it is string);

if(dt.rows.count > 0)
{
userid = dt[0]["userid"].ToString();
}
On the edit button click event.
Now you pass this userid in the where condition.
if you have any queries tell me

Thanks & Regards,
Santhi .V

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See my code
now tell me what i have to do??????????????

Public Sub updatedetails()
sqlcon = New SqlConnection("data source=I3-001\SQL2008R2; initial catalog=SmsDb; user id=sa; password=bss123")
sqlcon.Open()
cmd1 = New SqlCommand("update registration set username='" + txtuserNameEdit.Text + "',lastname='" + txtLastName.Text + "',Mobile=" + txtMobile.Text + ",emailID='" + txtEmailID.Text + "' where mobile =" + txtMobile.Text + " ", sqlcon)
cmd1.ExecuteNonQuery()
sqlcon.Close()
End Sub

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Hi

Can you tell me where you are showing the data.
It has been retrieved from the database.
Retrieve the userid along with that.
Tell me your scenario clearly.
This is more than enough.
You are done already.
Now you need to pass the userid.

Thanks & Regards,
Santhi .V

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In a frm
now i want to update these four filds
1 more column userid but i m not showing it........i hav to show only 4

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See i m pasting my code below.....................................but i can't do like this beacz if user gonna to havechange the field in where condition also
then it will show error

Public Sub updatedetails()
sqlcon = New SqlConnection("data source=I3-001\SQL2008R2; initial catalog=SmsDb; user id=sa; password=bss123")
sqlcon.Open()
cmd1 = New SqlCommand("update registration set username='" + txtuserNameEdit.Text + "',lastname='" + txtLastName.Text + "',Mobile=" + txtMobile.Text + ",emailID='" + txtEmailID.Text + "' where mobile =" + txtMobile.Text + " ", sqlcon)
cmd1.ExecuteNonQuery()
sqlcon.Close()
End Sub

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userid is your uniqueidentifier .
so use userid in wherecondition.......
where userid=txtUserid.text ..

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i m not displaying userid in that form .
there is no need to show it.....
so i m not showing it......
then how can i overcome ths pblm???????????/

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Hi

You no need to show that...
Save it in some variable and then use that on the where condition.

Thanks & Regards,
Santhi .V

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whether userid values and username values from database are same?

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userid and username both are dffferent columns name
database is same

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yes different column names...whether their values are same or different?

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how can they same??it is differen
because one is userid uniqueidentifier nad another username

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display userid in design page and make it invisible......

u have to bring like if(txtUsername.Text="username 4m table")
{
_userid= "userid of that username";

}

Now get those values and use in where condiiton

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Hi

This link contains an example for what you need.
Refer this link
http://www.aspdotnet-suresh.com/2011/02/how-to-inserteditupdate-and-delete-data.html

Thanks & Regards,
Santhi .V

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Create procedure spname
(
@username varchar(10),
@pwd varchar(10)
)
as

begin
set nocount on

declare @userid varchar(10)
set @userid=(Select UD_UserId from User_Details where UD_User_Name=@username )

update tablename set column1=@username where Ud_User_Id=@userid

set nocount off
end

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Hi Shanky11 ,

Please execute the following SQL script;
Use 'userid' in where condion because 'userid' is primary key.so its unique.

DECLARE @UserID AS UNIQUEIDENTIFIER;
DECLARE @mobile AS VARCHAR(20);
DECLARE @username AS VARCHAR(20);
DECLARE @lastname AS VARCHAR(20);
DECLARE @emailID AS VARCHAR(20);

SET @UserID= ''; --Example :- @UserID='3A2BBBE8-B153-46EE-BE20-A0D100C91542';
SET @mobile= ''; --Example :- @MobileNo=txtMobile.Text;
SET @username=''; --Example :- @Username=txtuserNameEdit.Text;
SET @lastname=''; --Example :- @Lastname=txtLastName.Text ;
SET @emailID= ''; --Example :- @EmailID=txtMobile.Text

BEGIN
UPDATE registration set username=@username,lastname=@lastname,Mobile=@mobile,emailID=@emailID WHERE userid=@UserID;
END

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Please mark as answer if it helpful to you..That helps others who search the same..

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