Hi Satvik, MATCH is faster than vlookup.
If your master file is unsorted, here are my best suggestions: 1. =IF(ISERROR(MATCH($A2,'[master file.xlsx]Sheet1'!$A$2:$A$11,0)),"Non Callable","Callable") 2. {=IF(ISERROR(MATCH($A2:$A11,'[master file.xlsx]Sheet1'!$A$2:$A$11,0)),"Non Callable","Callable")} Option 2 is a multi-cell array formula that should be a bit faster than option 1 and will also make your file a little smaller. Enter the formula in A2 of your DNC sheet, making sure the range $A2:$A11 references every row in your DNC sheet. Highlight the Callable column all the way down to the last row and then confirm your multi-cell array formula by hitting ctrl-shift-enter. If you take this route the DNC sheet will not be sortable and it will be hard to delete rows due to the formula spanning all those rows. That's the downside and the benefit may be only slight. If your master file is sorted, you can use these versions that should be even faster: 1. =IF(INDEX('[master file.xlsx]Sheet1'!$A$2:$A$11,MATCH($A2,'[master file.xlsx]Sheet1'!$A$2:$A$11))=$A2,"Callable","Non Callable") 2. {=IF(INDEX('[master file.xlsx]Sheet1'!$A$2:$A$11,MATCH($A2:$A11,'[master file.xlsx]Sheet1'!$A$2:$A$11))=$A2:$A11,"Callable","Non Callable")} Notice that for an unsorted master file, there is no need to include INDEX in the formula. All you need to know is if the tel. no. is in the file. Match determines that and it's position. Index would do unneeded work to rerieve the number. I use Index in the formula for a sorted list, because although Match is blazing fast with a sorted list, it will not return an error if the number is not found, so we need to verify that it found the correct number. Asa From: excel-macros@googlegroups.com [mailto:excel-macros@googlegroups.com] On Behalf Of Satvik Sent: Friday, March 02, 2012 5:49 PM To: excel-macros@googlegroups.com Subject: Re: $$Excel-Macros$$ Urgent Help Required...! Shaik, As off now I'm doing the same logic. Where as my data volume is too high....! Is there any other logic to map the same... Regards, Satvik Sent from BlackBerryR on Airtel _____ From: Shaik Waheed <waheedb...@gmail.com> Sender: excel-macros@googlegroups.com Date: Fri, 2 Mar 2012 20:43:19 +0530 To: <excel-macros@googlegroups.com> ReplyTo: excel-macros@googlegroups.com Subject: Re: $$Excel-Macros$$ Urgent Help Required...! Hi, You can use vlookup to find the callable # from DNC sheet. Find the attached file for ur reference. On Sat, Mar 3, 2012 at 6:59 AM, Satvik <satvik...@gmail.com> wrote: Thanks for the replay Shaik... Yes I need to check with DNC.. Sent from BlackBerryR on Airtel _____ From: Shaik Waheed <waheedb...@gmail.com> Sender: excel-macros@googlegroups.com Date: Fri, 2 Mar 2012 18:11:44 +0530 To: <excel-macros@googlegroups.com> ReplyTo: excel-macros@googlegroups.com Subject: Re: $$Excel-Macros$$ Urgent Help Required...! Hi, Do you want to chek whether the master file ph.# are callable or non-callable by verying it with NDNC sheet? On Sat, Mar 3, 2012 at 4:16 AM, Satvik <satvik...@gmail.com> wrote: Hi Every One, Friend I need a big help from you all, as I work in BPO company as a MIS executive but I am not aware about Access or SQL. But every day I need to scrub the NDNC data which I receive it from my client side.. Volume of a data will be around 5 to 6 lake. Where I get NDNC scrubbed file from the NDNC link using this file I need to map the NDNC status to my Master file. Will any one help me to do my work easier and do my other work @ the same time. Attached the sample files... Sample 1 - master file & Sample 2 - NDNC file. Regards, Satvik -- FORUM RULES (986+ members already BANNED for violation) 1) Use concise, accurate thread titles. Poor thread titles, like Please Help, Urgent, Need Help, Formula Problem, Code Problem, and Need Advice will not get quick attention or may not be answered. 2) Don't post a question in the thread of another member. 3) Don't post questions regarding breaking or bypassing any security measure. 4) Acknowledge the responses you receive, good or bad. 5) Cross-promotion of, or links to, forums competitive to this forum in signatures are prohibited. NOTE : Don't ever post personal or confidential data in a workbook. 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