Unique entries updated dynamically

vacation

Board Regular
Joined
Dec 6, 2003
Messages
56
Hi,

I have 5,000 rows of data in sheet1. Here is a sample:
Bob, ...
Tom, ...
Bob, ...
Pat, ...
Tom, ...

I would like to have:
1. Unique entries in column B of sheet2
2. These uinque entries come from column A of sheet1
3. So sheet2 column B would contain Bob, Tom, Pat
4. Every time the data is updated in sheet1 then sheet2 should be automatically updated with these non-duplicates from sheet1

How can I do this?

Thanks,
 

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north19701

Active Member
Joined
Jun 17, 2003
Messages
491
Code:
Private Sub Worksheet_Change(ByVal Target As Range)
On Error Resume Next
If Target.Column > 1 Then Exit Sub
Range("a1", Range("a65536").End(xlUp)).AdvancedFilter Action:=xlFilterCopy, CopyToRange:=Sheets("Sheet2").Range("B1" _
        ), Unique:=True
End Sub

Right-click on sheet1 and select view code, then paste the above code into the worksheet
 

Aladin Akyurek

MrExcel MVP
Joined
Feb 14, 2002
Messages
85,209
Applying Advaced Filter thru a Worksheet_Change event is attractive.

A formula approach is also possible...

Sheet1
Book1
ABCD
112
2Name0
3Bob1
4Tom2
5Bob 
6Pat3
7Tom 
8 
9Jacob4
10Jon5
11Brian6
12Jon 
13
Sheet1


A1:

=MATCH(REPT("z",255),Sheet1!A:A)

which delivers a value that can be used by code which copies formulas down.

B2 must house a 0.

B3 houses

=IF((A3<>"")*ISNA(MATCH(A3,$A2:A$2,0)),LOOKUP(9.99999999999999E+307,$B$2:B2)+1,"")

which is copied down (manually or by code).

Sheet2
Book1
BCDE
16
2Name
3Bob
4Tom
5Pat
6Jacob
7Jon
8Brian
9 
10 
Sheet2


B1 houses:

=LOOKUP(9.99999999999999E+307,Sheet1!B:B)

whose result can also be used code which would copy formulas down.

B3 houses:

=IF(ROW()-ROW($B$3)+1<=$B$1,INDEX(Sheet1!A:A,MATCH(ROW()-ROW($B$3)+1,Sheet1!B:B)),"")

which is copied down either manually or by code.
 
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