Script to find username and corresponding loginname for all user database in SQL Server 2005/2008/2008R2

create proc LoginsAndUsers
as
begin
create table #systemdbs (name sysname)
insert #systemdbs
select 'master'
union select 'msdb'
union select 'model'
union select 'tempdb'

create table #dbusers (DatabaseName sysname, UserName sysname, GroupName sysname, LoginName sysname null,
DefDBName sysname null, DefSchemaName sysname null, UserID int, SID varbinary(1000))

create table #dbusersbuffer ( UserName sysname, GroupName sysname, LoginName sysname null,
DefDBName sysname null, DefSchemaName sysname null, UserID int, SID varbinary(1000))



declare @Command nvarchar(1012)
set @Command= 'if not exists (select * from #systemdbs where name = ''?'') begin '+char(13)+
+'use ? ; insert #dbusersbuffer exec sp_helpuser'+char(13)
+'insert #dbusers select ''?'', * from #dbusersbuffer'+char(13)
+'truncate table #dbusersbuffer'+char(13)
+'end'
print @Command

exec sp_MSforeachdb @command1 = @Command

select databasename,username,groupname,loginname,defdbname from #dbusers  where username != 'dbo' and groupname !='public' order by DatabaseName

drop table #dbusers
drop table #dbusersbuffer
drop table #systemdbs
end
go

exec LoginsAndUsers
drop proc loginsandusers