Hi,
I have an excel database worksheet and occupied 65,000 rows and 15 columns.Column A had this formula (=IF(COUNTIF(B:B,B7)>1, "Duplicate!","Not Duplicate")), Column B had this forumula (=CONCATENATE(SUBSTITUTE(SUBSTITUTE(C2,",",".")," ",""),D2,SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(G2,",",""),"...