Logging Software

[DL8MBS]

I´m looking for a log-software that can compare the qsos in a new imported (contest-)log with the existing database for stations worked for the first time.
I.e. having 300 fresh contest-qsos in an adif-file. Now I want to find those maybe 35 Stations, with which I never had any qso before - for sending QSL-cards only once to any ham (cos there are only few stations like KC1XX or RD3A I remember without PC as having worked before). So I´m looking for a tool to flag those new ones in the contest-log by comparing the 300 with all the previous few thousand qsos already stored in the database.
Til now I learnt that at least it would be possible to write a SQL-search in Winlog32. Any easier ways?

Thanks in advance and best 73,
Chris (DL8MBS)

[KC8UJZ]

Check out N3FJP's software.  It can be found at www.n3fjp.com.  When you type in a call, there is a spot that lights up 'new' if it is a new call.  You can also check a box for when you QSL them.  The 45 day trial is free, but the software is $19.00 us dollars.  

73
KC8UJZ

[DL8MBS]

Thanks Richard,
the flagging of the single qso just typed in doesn´t seem to be diffucult for several programs. But how ist this done with a bunch of qsos imported at the same time?
Guess I have to learn something about SQL...
Thanks and 73, Chris (DL8MBS)