Best Server Role for Web Applications

Hi,
I'm running SQL Server 2008 R2 Express and using Microsoft SQL Server Manager Studio to administer it. I have a web application that does read, add, update, and delete to the database and I am currently using the sa account - which is of course not
a good idea. I want to create a new user but I don't know what the best practice is for web applications and also security. The options I have are:
bulkadmin
dbcreator
diskadmin
processadmin
public
securityadmin
serveradmin
setupadmin
sysadmin
Thanks.

Hi mark_sti,
Based on my understanding, you want to create a new user of the database. Using this new account, a web application could read, add, update, and delete the database.
The options you provide are fixed server roles. For more information about fixed server roles, please refer to this article:
Server-Level Roles.
In this scenario, you need db_datareader fixed database role and db_datawriter fixed database role. Db_datareader fixed database role can read all data from all user tables. Db_datawriter fixed database role can add, delete, or change data in all user tables.
To add two database roles, you should map the login to the database which is used by a web application in Login Properties. Then create a new database user, check Db_datareader fixed database role and Db_datawriter fixed database role on Membership page of
Database User. About permission of different database roles, please refer to this article:
Database-Level Roles.
If you have any question, please feel free to ask.
Best regards,
Qiuyun Yu

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