how to manage multiple request at one time with sql server in asp.net website.

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SQL-Server-2005

.NET3.5

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i want to insert record in the sql server database table.
table structure
Sno int,
name varchar,
companycode int.
i want recognize sno by company code at the response on web request.
like company code 1 is one then sno start from 1,2,3,4...so on.same for another company code.
my problem is when i am requesting table at same time then same no is generated.
i had also tried stored procedure but it fails when multiple request generated at a time.
please help me to resolve this issue.

Posted 24-Jan-14 23:22pm

Member 8825505

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V5709 · Answer 1 · 2014-01-26T17:59:00

Solution 3

Try to do something like this.

SQL

DECLARE @MAX_sno int=null;
SELECT @MAX_sno=MAX(person_id) FROM TABLENAME WHERE companycode='Your_companycode'   ;
SET @MAX_sno=@MAX_sno+1;

----In MAX_sno you will get new sno value which can be used for new record insertion

Posted 26-Jan-14 17:59pm

V5709

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Member 8825505 1-Feb-14 0:18am

it not work for me. :-( i try it from multiple terminal computer at ones than it going to fail.

V5709 1-Feb-14 0:31am

try this.
------------

DECLARE @MAX_sno int=null;
SELECT @MAX_sno=MAX(person_id) FROM TABLENAME WITH (HOLDLOCK) WHERE companycode='Your_companycode' ;
SET @MAX_sno=@MAX_sno+1;

----------------------

Abhinav S · Answer 2 · 2014-01-24T23:28:00

Solution 1

Change the table design.
Set the Sno as a primary key that increments for every row - http://technet.microsoft.com/en-us/library/ms189039.aspx[^].

If you do not want Sno to be a primary key, you can still make it increment automatically - http://technet.microsoft.com/en-us/library/aa933196%28v=sql.80%29.aspx[^].

Posted 24-Jan-14 23:28pm

Abhinav S

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Member 8825505 25-Jan-14 5:40am

but i have already mentioned i need different sno company wise.

samit kaneriya 25-Jan-14 7:19am

hi give Procedure code for insert time