open Skype DB with history and remove some items (Mac OS)

skype_history.sh

# shutdown Skype
# Skype username - it's a login at Skype
# Mac username - it's a short username of Mac OS X (ex.: dive)
# <...> should be entered without brackets <>

#copy this one, paste to Terminal.app and hit Enter
sqlite3 "$HOME/Library/Application Support/Skype/<your_skype_username>/main.db"

#then copy this one, paste to Terminal.app where sqlite3 running and hit Enter
delete from Messages where dialog_partner = '<delete_history_of_conversation_with_particurarly_username>';

#done
#if you want to remove history with another username, just hit Up arrow and replace username