sanırım bu
Nday:=DAYOFMONTH()<>ref(DAYOFMONTH(),-1) ;
ct:=valuewhen(1,nday,cum(1));
valuewhen(1,ct+1=Cum(1),MINUTE()+HOUR()*100)-valuewhen(1,ct=Cum(1),MINUTE()+HOUR()*100)
http://www.hisse.net/forum/showthrea...28162&page=759
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