db_denydatawriter
Members of the db_denydatawriter fixed database role cannot add, modify, or delete any data in the user tables within a database.
See Also
Reference
Concepts
Permissions of Fixed Database Roles
Other Resources
sp_dbfixedrolepermission (Transact-SQL)
sp_helpdbfixedrole (Transact-SQL)
Security Considerations for Databases and Database Applications