declare @endday varchar(2)
declare @strYear varchar(4)
declare @strMonth varchar(2)
declare @strDay varchar(2)
DECLARE @sday varchar(50)
DECLARE @eday varchar(50)
DECLARE @cmd varchar(300)
DECLARE @cmd2 varchar(300)
DECLARE @name nvarchar(255)

set @strYear = YEAR(getdate())
set @strMonth = datename(m,getdate())
set @strDay = datename(d,getdate())
set @endday = convert(int,@strDay)+1

IF LEN(@strMonth) = 1 SET @strMonth = N'0' + @strMonth 
IF LEN(@strDay) = 1 SET @strDay = N'0' + @strDay

/* ------------------------------------------------- */
SET @sday = 'Daliy_LOG_'+@strYear + @strMonth + @strDay
SET @eday = 'Daliy_LOG_'+@strYear + @strMonth + @endday
/* ------------------------------------------------- */

DECLARE detach_db CURSOR
READ_ONLY
FOR

  SELECT name FROM sys.databases WHERE name >= @sday AND name <= @eday ORDER BY name

OPEN detach_db
FETCH NEXT FROM detach_db INTO @name

WHILE @@fetch_status=0
BEGIN

SET @cmd= '
Use ['+@name+']
CREATE USER [testuser] FOR LOGIN [testuser]
EXEC sp_addrolemember '+''''+'db_datareader'+''''+','+''''+'testuser'+'''
'


EXECUTE (@cmd)


FETCH NEXT FROM detach_db INTO @name

END

CLOSE detach_db
DEALLOCATE detach_db