e corect asa?

UPDATE aaa SET Principal= 0

WHERE DataInregistrare IN (

SELECT TOP 2 DataInregistrare

FROM aaa b

WHERE b.CodContract=aaa.CodContract

AND DATEDIFF(month, DataInregistrare, ( SELECT MIN(DataInregistrare)

FROM aaa c

WHERE c.CodContract=b.CodContract

)

) = 0

and DataInregistrare > ( SELECT MIN(DataInregistrare)

FROM aaa c

WHERE c.CodContract=aaa.CodContract)

ORDER BY DataInregistrare asc

)

multumesc.

alex.