How to prevent multiple entry in table of Sql Server on prequent data modification ?

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SQL-Server-2008R2

I have one table. in which i want to insert maximum three row against each key. so please tell me how to prevent it. as there are very fast (mili second) entry is being done.

Posted 23-Sep-14 20:58pm

Gaurav Gupta A Tech Guy

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syed shanu 24-Sep-14 3:48am

Can you explain more with your example data.

[no name] 24-Sep-14 3:52am

make clear your requirement

Gaurav Gupta A Tech Guy 24-Sep-14 8:44am

Requirement is that i need to submit student record for their papers but condidtion is that we can't allow them to have above 3 paper for a login id. so if two candidate open the page same time with same page with same credential. so both should not be allowed.

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**DiponRoy** · Answer 1 · 2014-09-23T21:57:00

Solution 1

use strop procedure to insert your data, examples
http://www.sqlinfo.net/sqlserver/sql_server_stored_procedure_INSERT.php[^]
http://www.mssqltips.com/sqlservertutorial/2519/insert-stored-procedure-in-sql-server/[^]

In side procedure make sure you check,

If data count >= 3 for this key throw exception
else let it to be inserted

and the transaction obliviously.

Posted 23-Sep-14 21:57pm

DiponRoy

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Gaurav Gupta A Tech Guy 24-Sep-14 8:46am

it will not solve my problem. i already know this. but for very frequent transaction. it might not work..

DiponRoy 24-Sep-14 12:55pm

hmm ... it's true that i haven't worked with the most efficient solution.

But once i worked on a project where every table had a log table for it self. If an affect like add/update/delete was been made for a row of a table, the full row was been transferred to the log table.

and some time one requirement was affecting more that 3 or 4 main tables.

and about 450 people was been affecting rows every day. But this solution worked for us. So you can try out this. How about you make a test page like this and take a load test .. !!!