Look-Up duplicate value in column S:S and return the date in B:B from the duplicate value

R

RonFos3394

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Jun 19, 2023
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  1. 365
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  1. Windows
Hi

Hoping someone can help, been racking my brains for a while on this one.

I've got a table of data from A5:AD15000. In column B:B is dates/times. In Column S:S is serial numbers and will have duplicate values.

*Note there may be more than 1 duplicate of the same value however I only want it to look for 2nd duplicate then if it finds the same serial again to treat it as another entry and look for a 2nd duplicate. (hope this makes sense).

The data table is sorted by date/time.

I'm wanting to find a formula that if a duplicate value is found within S:S to return the date/time located in the column B:B of the duplicate value. So I can find out the time difference between the two serial numbers.

Alternatively, if I can find the duplicates and have the formula work out if the date/time in B:B is within 48 hours to return "TRUE" or "FALSE".

Any help would be awesome!

Cheers
 

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Hi, welcome to the forums!

Maybe something like this could help. Might not be 100% what you need, but probably something in the right direction.
I am not sure where you want this formula to be, but for this example it's in column A.

Book2
ABCDEFGHIJKLMNOPQRS
1Supply Vessel
2No Duplicates01-Jun-23 6:06 PMa
3FALSE02-Jun-23 6:06 PMbb
4No Duplicates03-Jun-23 6:06 PMz
5No Duplicates04-Jun-23 6:06 PMs
6No Duplicates05-Jun-23 6:06 PMl
7No Duplicates06-Jun-23 6:06 PMaa
8No Duplicates07-Jun-23 6:06 PMad
9No Duplicates08-Jun-23 6:06 PMab
10No Duplicates09-Jun-23 6:06 PMcd
11No Duplicates10-Jun-23 6:06 PMde
12No Duplicates11-Jun-23 6:06 PMfg
13No Duplicates12-Jun-23 6:06 PMqw
14Paired above13-Jun-23 6:06 PMbb
15No Duplicates14-Jun-23 6:06 PMp
16No Duplicates15-Jun-23 6:06 PMi
17No Duplicates16-Jun-23 6:06 PMo
18No Duplicates17-Jun-23 6:06 PMk
19TRUE18-Jun-23 6:06 PMbb
20No Duplicates19-Jun-23 6:06 PMll
21No Duplicates20-Jun-23 6:06 PMkk
22Paired above21-Jun-23 6:06 PMbb
23No Duplicates22-Jun-23 6:06 PMbb
24No Duplicates23-Jun-23 6:06 PMj
25No Duplicates24-Jun-23 6:06 PMh
26No Duplicates25-Jun-23 6:06 PMg
Sheet1
Cell Formulas
RangeFormula
A2:A26A2=IF(MOD(COUNTIF(S$1:S2,S2),2)=1,IF(ISNA(VLOOKUP($S2,CHOOSE({1,2},$S3:$S$15000,$B3:$B$15000),2,0)),"No Duplicates",IF(ABS(TODAY()-VLOOKUP($S2,CHOOSE({1,2},$S3:$S$15000,$B3:$B$15000),2,0))<=2,TRUE,FALSE)),"Paired above")
 
Upvote 0
Another option
Fluff.xlsm
ABST
1
219/06/2023 12:00A 
319/06/2023 18:00B 
420/06/2023 00:00A19/06/2023 12:00
520/06/2023 06:00D 
620/06/2023 12:00E 
720/06/2023 18:00B19/06/2023 18:00
821/06/2023 00:00G 
921/06/2023 06:00E20/06/2023 12:00
1021/06/2023 12:00I 
1121/06/2023 18:00G21/06/2023 00:00
1222/06/2023 00:00K 
1322/06/2023 06:00L 
1422/06/2023 12:00K22/06/2023 00:00
1522/06/2023 18:00A 
1623/06/2023 00:00O 
1723/06/2023 06:00P 
1823/06/2023 12:00A22/06/2023 18:00
1923/06/2023 18:00R 
2024/06/2023 00:00S 
2124/06/2023 06:00D20/06/2023 06:00
2224/06/2023 12:00U 
2324/06/2023 18:00V 
2425/06/2023 00:00O23/06/2023 00:00
2525/06/2023 06:00X 
2625/06/2023 12:00Y 
Master
Cell Formulas
RangeFormula
T2:T26T2=IF(ISEVEN(COUNTIFS(S$2:S2,S2)),XLOOKUP(S2,S$1:S1,B$1:B1,,,-1),"")
 
Upvote 0
Solution
Fluff said:
Another option
Fluff.xlsm
ABST
1
219/06/2023 12:00A 
319/06/2023 18:00B 
420/06/2023 00:00A19/06/2023 12:00
520/06/2023 06:00D 
620/06/2023 12:00E 
720/06/2023 18:00B19/06/2023 18:00
821/06/2023 00:00G 
921/06/2023 06:00E20/06/2023 12:00
1021/06/2023 12:00I 
1121/06/2023 18:00G21/06/2023 00:00
1222/06/2023 00:00K 
1322/06/2023 06:00L 
1422/06/2023 12:00K22/06/2023 00:00
1522/06/2023 18:00A 
1623/06/2023 00:00O 
1723/06/2023 06:00P 
1823/06/2023 12:00A22/06/2023 18:00
1923/06/2023 18:00R 
2024/06/2023 00:00S 
2124/06/2023 06:00D20/06/2023 06:00
2224/06/2023 12:00U 
2324/06/2023 18:00V 
2425/06/2023 00:00O23/06/2023 00:00
2525/06/2023 06:00X 
2625/06/2023 12:00Y 
Master
Cell Formulas
RangeFormula
T2:T26T2=IF(ISEVEN(COUNTIFS(S$2:S2,S2)),XLOOKUP(S2,S$1:S1,B$1:B1,,,-1),"")
Click to expand...
Thank you for this!! Massively helped. It's got me 99% of the way there.

Is there possibly a way for the formula to repeat on the 3rd/5th duplicate found in column S to present the date from column B from the 2nd/4th duplicate.

The current formula seems to be working perfectly for 1st - 2nd duplicate and 3rd - 4th duplicate but doesn't pick up the dates from 2nd to 3rd etc.

Really appreciate your help
 
Upvote 0
RonFos3394 said:
The current formula seems to be working perfectly for 1st - 2nd duplicate and 3rd - 4th duplicate but doesn't pick up the dates from 2nd to 3rd etc.
Click to expand...
I thought that's what you wanted as you originally said
RonFos3394 said:
I only want it to look for 2nd duplicate then if it finds the same serial again to treat it as another entry and look for a 2nd duplicate.
Click to expand...
If you want it to show the previous date time for all duplicates try
Fluff.xlsm
ABST
1
219/06/2023 12:00A 
319/06/2023 18:00B 
420/06/2023 00:00A19/06/2023 12:00
520/06/2023 06:00D 
620/06/2023 12:00E 
720/06/2023 18:00B19/06/2023 18:00
821/06/2023 00:00G 
921/06/2023 06:00E20/06/2023 12:00
1021/06/2023 12:00I 
1121/06/2023 18:00G21/06/2023 00:00
1222/06/2023 00:00K 
1322/06/2023 06:00L 
1422/06/2023 12:00K22/06/2023 00:00
1522/06/2023 18:00A20/06/2023 00:00
1623/06/2023 00:00O 
1723/06/2023 06:00P 
1823/06/2023 12:00A22/06/2023 18:00
1923/06/2023 18:00R 
2024/06/2023 00:00S 
2124/06/2023 06:00D20/06/2023 06:00
2224/06/2023 12:00U 
2324/06/2023 18:00V 
2425/06/2023 00:00O23/06/2023 00:00
2525/06/2023 06:00X 
2625/06/2023 12:00Y 
Master
Cell Formulas
RangeFormula
T2:T26T2=IF(COUNTIFS(S$2:S2,S2)>1,XLOOKUP(S2,S$1:S1,B$1:B1,,,-1),"")
 
Upvote 0
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