Thank you for your fast reply.
Response question 1:
Date 2022-06-01: counter T1 = 9015927, counter T2 = 6711605
New Meter
Date 2022-06-03: counter T1 = 12991 counter T2 = 5890
Is SQL command below correct?
UPDATE NT_ORIG_NEW
SET diff = round(value, 3)
WHERE (diff < 0.0) AND (value < 10);
Response question 2:
I can retreive the missing data from a separate solar management portal. I will add this data to the import. This will fix the issue.