If anybody know how to handle the problem, let me know please.
I have 2 tables with the similar 4 fields.
The first table is temporary( and small) and the second one is big.
table TMP table MAIN
DATE DN ConvTime DIGITS DATE DN ConvTime DIGITS
I want to add each record from the TMP into the MAIN in condition, that
there is no record in MAIN with the same combination of DATE,DN and
DIGITS. Otherwise ( if such a combination already exists) I have to
replace existing record with the new one BUT THE FIELD ConvTime MUST BE
Thanks in advance.