Help needed on select and insert query

a bit of a begginer's request here.
I have a table called t_user in which username is the primary key and one of
the fields is a decimal called bsl.
I'm trying to write a stored procedure that selects the right record based
on the username (input from a cookie) and then inserts the bsl value based o
n
the users input into a textbox on the asp.net page
the stored proc code is
CREATE PROCEDURE addbsl
@.bsl decimal,
@.username varchar(20)
AS
SELECT username FROM t_user
WHERE username = @.username
insert into t_user (bsl) values (@.bsl)
GO
and when i run it in the query analyser it tells me:
Server: Msg 515, Level 16, State 2, Procedure addbsl, Line 8
Cannot insert the value NULL into column 'username', table
'FYProj.dbo.t_user'; column does not allow nulls. INSERT fails.
The statement has been terminated.
(1 row(s) affected)
Stored Procedure: FYProj.dbo.addbsl
Return Code = -6
I understand that it is trying to insert a username as well but cannot
because you cannot enter a null value but I don't want it to input a sername
i just want it to insert data into the record with the specified username
Is there a way to change the sproc to get it to work or am i just taking the
wrong approach?You will have to use an UPDATE statement to update an existing row. INSERT
always insert a new row.
Hello neil_pat,

> a bit of a begginer's request here.
<snip>
Lasse Vgsther Karlsen
http://www.vkarlsen.no/
mailto:lasse@.vkarlsen.no
PGP KeyID: 0x0270466B