Find the last date/time with criteria

sharky12345

Well-known Member
Joined
Aug 5, 2010
Messages
3,404
Office Version
  1. 2016
Platform
  1. Windows
I'm trying to find a way I can identify the last date and time in a range but with the condition that it does not fall after another date/time.

So range A2:A1000 has a serial number, range B2:B1000 has a date and time stamp - there will be duplicates of the serial number but each time stamp is unique. On another sheet I have the serial numbers in range C2:C1000 and further date/time stamps in range D2:D1000, I have other data in the range E2:1000.

What I need to do is lookup the value in column A of the first sheet, find it in column C of the 2nd sheet, then go through column D of the 2nd sheet, (where the value in A matches), and find the last date/time without going past the original time in column B of the first sheet, then give me the value from column E on the 2nd.

I've tried to explain as best I can, I know it sound really complicate but maybe this will assist;

So this is sheet 1:

Test workbook.xlsm
AB
1Serial NumberSign Date
2CR200002063401/10/2020 01:22
3CR200002063401/10/2020 01:50
4CR200002063501/10/2020 01:23
5CR200002063501/10/2020 01:51
6CR200002063501/10/2020 02:20
7CR200002063501/10/2020 02:49
8CR200002063501/10/2020 03:13
9CR200002063501/10/2020 03:44
10CR200002063501/10/2020 04:10
Sheet1


And this is sheet 2:

Test workbook.xlsm
CDE
1SerialTimestampValue to return
2CR200002063401/10/2020 01:2015
3CR200002063401/10/2020 01:4930
4CR200002063501/10/2020 01:2160
5CR200002063501/10/2020 01:4515
6CR200002063501/10/2020 02:1030
7CR200002063501/10/2020 02:3915
8CR200002063501/10/2020 03:0360
9CR200002063501/10/2020 03:4360
10CR200002063501/10/2020 04:0930
Sheet2


So if I looked up the time stamp in B2 on sheet 1, the value I'd expect to return is 15, which is the value from E2 on sheet 2. If I looked up the time stamp in B6 on sheet 1 I'd expect the return value to be 30, from E6 on the 2nd sheet.

Does my explanation make sense or have I confused the hell out of everyone?
 
you mean like this?
SerialLastV2R
CR200002063401/10/2020 01:22:5915
CR200002063501/10/2020 01:23:3960
 
Upvote 0

Excel Facts

Select all contiguous cells
Pressing Ctrl+* (asterisk) will select the "current region" - all contiguous cells in all directions.
There is no date/time in sheet2 less than the date/time in sheet1 for that serial number.
That's odd because there is.....I'll double check the cell formatting to see if that makes a difference
 
Upvote 0
Yes that's it - sorry for any confusion!
here is M for this
Power Query:
// Query1
let
    Tbl1 = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    Tbl2 = Excel.CurrentWorkbook(){[Name="Table2"]}[Content],
    Join = Table.NestedJoin(Tbl2,{"Serial"},Tbl1,{"Serial Number"},"Table",JoinKind.LeftOuter),
    Expand = Table.ExpandTableColumn(Join, "Table", {"Serial Number", "Sign Date"}, {"Serial Number", "Sign Date"}),
    Group = Table.Group(Expand, {"Serial"}, {{"Last", each List.Min([Sign Date]), type datetime}, {"Count", each _, type table}}),
    DTT = Table.TransformColumnTypes(Group,{{"Last", type datetime}}),
    V2R = Table.AddColumn(DTT, "V2R", each List.First(List.Distinct([Count][Value to return])))
in
    V2R
 
Upvote 0
here is M for this
Power Query:
// Query1
let
    Tbl1 = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    Tbl2 = Excel.CurrentWorkbook(){[Name="Table2"]}[Content],
    Join = Table.NestedJoin(Tbl2,{"Serial"},Tbl1,{"Serial Number"},"Table",JoinKind.LeftOuter),
    Expand = Table.ExpandTableColumn(Join, "Table", {"Serial Number", "Sign Date"}, {"Serial Number", "Sign Date"}),
    Group = Table.Group(Expand, {"Serial"}, {{"Last", each List.Min([Sign Date]), type datetime}, {"Count", each _, type table}}),
    DTT = Table.TransformColumnTypes(Group,{{"Last", type datetime}}),
    V2R = Table.AddColumn(DTT, "V2R", each List.First(List.Distinct([Count][Value to return])))
in
    V2R
Sorry but that makes no sense to me - I don't know what it is.
 
Upvote 0
this is Power Query (Get&Transform)
You've XL2016 so Power Query is built-in
pqpic.jpg

for more info
 
Upvote 0
It does
+Fluff v2.xlsm
ABCDE
1SerialTimestampValue to return
2CR200002063401/10/2020 01:2015
3CR200002063401/10/2020 01:4930
4CR200002063501/10/2020 01:2160
5CR200002063501/10/2020 01:4515
6CR200002063501/10/2020 02:1030
7CR200002063501/10/2020 02:3915
8CR200002063501/10/2020 03:0360
9CR200002063501/10/2020 03:4360
10CR200002063501/10/2020 04:0930
11
Sheet2


+Fluff v2.xlsm
ABC
1Serial NumberSign Date
2CR200002063401/10/2020 01:2215
3CR200002063401/10/2020 01:5030
4CR200002063501/10/2020 01:2360
5CR200002063501/10/2020 01:5115
6CR200002063501/10/2020 02:2030
7CR200002063501/10/2020 02:4915
8CR200002063501/10/2020 03:1360
9CR200002063501/10/2020 03:4460
10CR200002063501/10/2020 04:1030
Sheet1
Cell Formulas
RangeFormula
C2:C10C2=INDEX(Sheet2!$E$2:$E$10,AGGREGATE(14,6,(ROW(Sheet2!$D$2:$D$10)-ROW(Sheet2!$D$2)+1)/(Sheet2!$C$2:$C$10=A2)/(Sheet2!$D$2:$D$10<B2),1))
Fluff I've found the issue but can't work out how to quickly resolve it.

The date and time values in sheet 2 are in this format: dd/mm/yyyy hh:mm (General) - if I click in the cell and press the enter key it adds the seconds too in the formula bar and the format changes to a correct date/time format, then the formula works. So is there a quick way I can convert every cell without clicking into each one and pressing enter?
 
Upvote 0
It sounds like they are text & not real dates, you can use Text to columns on the Data tab.
Select the column & in text to columns select delimited, next, clear all check boxes, next, select DMY in the date dropdown, Finish.
 
Upvote 0
It sounds like they are text & not real dates, you can use Text to columns on the Data tab.
Select the column & in text to columns select delimited, next, clear all check boxes, next, select DMY in the date dropdown, Finish.
That's done it!

Thank you again Fluff.
 
Upvote 0
You're welcome & thanks for the feedback.
 
Upvote 0

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