Get the list of all SQL User Accounts SQL Server:
SELECT name AS Login_Name, type_desc AS Account_Type
FROM sys.server_principals
WHERE TYPE IN ('U', 'S', 'G')
and name not like '%##%'
ORDER BY name, type_desc
Get the list of all SQL User Accounts Database only
SELECT name
FROM sys.server_principals
WHERE TYPE = 'S'
and name not like '%##%'
Get the list of all Windows User Accounts only
SELECT name
FROM sys.server_principals
WHERE TYPE = 'U'
Get the list of all Windows Group User Accounts only
SELECT name
FROM sys.server_principals
WHERE TYPE = 'G'
