Find missing labels in a specific language

Recently, I had to find out if a label exists in a certain language (in the example de_at), or not. Well suited for it seems the following SQL statement.

SELECT *
FROM [AX2012R3_TEST_model].[dbo].[ModelElementLabel] as existing
where existing.Module = 'myModule'
and existing.Language = 'en_us'
and not exists
( select *
from [AX2012R3_TEST_model].[dbo].[ModelElementLabel] as missing
where missing.labelid = existing.LabelId
and missing.Module = existing.Module
and missing.Language = 'de_at')