Hai Fajar, mis ada 2 wb, book 1 dan book2 dan di boook 1 maupun book 2 (Sheet1) masing2 ada 3 nama Customer di kolom Amaka di book 2 Sheet 1 sel B1 bisa ditulis formula =COUNTIF([Book1]Sheet1!$A$1:$A$3,A1)kemudian di copas ke bawah. Nama customer yang sama ada di book 2 Sheet 1 kolom B (Jumlahkan kolom B). Salam,HK From: "Fajar Fatahillah fajar.fatahil...@yahoo.com [belajar-excel]" <belajar-excel@yahoogroups.com> To: belajar-excel@yahoogroups.com Sent: Thursday, 15 September 2016, 14:24 Subject: [belajar-excel] menghitung data duplikat pada dua workbook/file yang berbeda Dear Master Excel,mohon bantuannya untuk kasus saya,ada dua file/workbook berbeda yang berisi nama-nama costumer,yang ingin saya tanyakan , bagaimana cara menghitung jumlah nama costumer yang sama antara file 1 dan file 2.Terima kasih Best Regards, Fajar Fatahillah
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