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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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“The login already has an account under a different user name.” – MSSQL

Posted by jpluimers on 2018/07/11

You get “The login already has an account under a different user name.” when you try to create a user that already exists.

In this case it was a statement somewhere in a database creation script having a statement like this:

exec sp_addlogin N'<<UserName>>', N'<<Password>>', @logonDatabase, @logonLanguage

What happened was that the <<UserName>> in the script already existed and was used to create the new user using sp_addlogin.

I know that this is deprecated, but the search above also shows it happen with other ways of adding users.

It had been a while since doing SQL Server, so this was a good time for me to find back the relation between [WayBack] SQL Server Logins and Users

These queries will help you identify which ones are currently in your database:

use CRM124TestJWP
go

select sl.name as LoginName
     , su.name as UserName
     , sl.dbname as DatabaseName
from sys.sysusers su
join sys.syslogins sl on sl.sid = su.sid

select sp.name as LoginName
     , sp.type_desc as LoginType
     , dp.name as UserName
     , dp.type_desc as UserType
     , sp.default_database_name as DefaultDatabase
     , dp.default_schema_name as DefaultSchema
from sys.server_principals sp
join sys.database_principals dp on dp.sid = sp.sid

Via: [WayBack] sql server – The login already has an account under a different user name – Database Administrators Stack Exchange

Related:

–jeroen

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