I have the issue that the customer wants to see an overview of sent email count and bounced count by Business Unit (and they will have thousands).
So I created Queries for that which work fine for _Bounce but they don't for _Sent and I have no idea where the difference would be. Here comes the two queries:
Bounce (works fine):
SELECT OYBAccountID, count(SubscriberKey) as BounceCount
FROM _Bounce
WHERE AccountID = '6270127' AND BounceType = 'Hard bounce'
GROUP BY OYBAccountID
Sent (fails):
SELECT OYBAccountID, count(SubscriberKey) as SentCount
FROM _Sent
WHERE AccountID = '6270127'
GROUP BY OYBAccountID
Any idea?