#### Comparing text strings

```I have two columns populated with names and I need to compare them for
duplicates.  Some duplicate names may contain middle initial or middle names
and some don't. So they may not be EXACT.  Please give me suggestions on
formulas or funcions that would help me accomplish this task.
Thanks.
```
 0
Utf
11/27/2009 7:12:01 PM
excel.worksheet.functions 4936 articles. 2 followers.

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```On Fri, 27 Nov 2009 11:12:01 -0800, Comparing columns with text <Comparing
columns with text@discussions.microsoft.com> wrote:

>I have two columns populated with names and I need to compare them for
>duplicates.  Some duplicate names may contain middle initial or middle names
>and some don't. So they may not be EXACT.  Please give me suggestions on
>formulas or funcions that would help me accomplish this task.
>Thanks.

This is an interesting problem, and not particularly easy to solve, unless you
can be very specific, and limiting, in the allowable variability.

For example, given the following:

Name = FirstName [MI or Middle Name] LastName

you could construct an algorithm that looks first for an exact match in
FirstName and LastName followed by a comparison of what is in between.

For example:

Name 1		matches in Name 2
No MI of MN	  anything
MI		  same MI or MN starting with MI or nothing
MN		  MI = left(MN,1) or same MN or nothing

Exactly how to construct this algorithm depends critically on how your data is
stored, and how you define "duplicate names"

On the other hand, if you are looking to answer the question, "do two different
names represent the same person", then a Soundex (or NYSIIS) method might be
better.

http://j-walk.com/ss/excel/tips/tip77.htm
http://en.wikipedia.org/wiki/New_York_State_Identification_and_Intelligence_System
--ron
```
 0
Ron
11/27/2009 8:07:25 PM
```really interestgin

one way is to
trim all names and  sort colums and compare first few letters then
compare last names (last name with mid() function).

yours
sajay

"Comparing columns with text" <Comparing columns with
text@discussions.microsoft.com> wrote in message
news:631049AB-8D09-4C42-BCEE-51FA39C7BB65@microsoft.com...
> I have two columns populated with names and I need to compare them for
> duplicates.  Some duplicate names may contain middle initial or middle
> names
> and some don't. So they may not be EXACT.  Please give me suggestions on
> formulas or funcions that would help me accomplish this task.
> Thanks.

```
 0
sajay
11/28/2009 6:46:48 AM
```Maybe this formula?

=AND(LEFT(A1,FIND(" ",A1)-1)=LEFT(B1,FIND("
",B1)-1),TRIM(RIGHT(SUBSTITUTE(A1," ",REPT("
",99)),99))=TRIM(RIGHT(SUBSTITUTE(B1," ",REPT("
",99)),99)),IF(LEN(A1)-LEN(SUBSTITUTE(A1,"
",""))=LEN(B1)-LEN(SUBSTITUTE(B1," ","")),MID(A1,FIND(" ",A1&" ")+1,FIND("
",A1&" ",FIND(" ",A1&" ")+1)-FIND(" ",A1&" ")-1)=MID(B1,FIND(" ",B1&"
")+1,FIND(" ",B1&" ",FIND(" ",B1&" ")+1)-FIND(" ",B1&" ")-1),TRUE))

--
Rick (MVP - Excel)

"Ron Rosenfeld" <ronrosenfeld@nospam.org> wrote in message
news:rhb0h5h2rdun41eo19uttd0dov3iihffbg@4ax.com...
> On Fri, 27 Nov 2009 11:12:01 -0800, Comparing columns with text <Comparing
> columns with text@discussions.microsoft.com> wrote:
>
>>I have two columns populated with names and I need to compare them for
>>duplicates.  Some duplicate names may contain middle initial or middle
>>names
>>and some don't. So they may not be EXACT.  Please give me suggestions on
>>formulas or funcions that would help me accomplish this task.
>>Thanks.
>
> This is an interesting problem, and not particularly easy to solve, unless
> you
> can be very specific, and limiting, in the allowable variability.
>
> For example, given the following:
>
> Name = FirstName [MI or Middle Name] LastName
>
> you could construct an algorithm that looks first for an exact match in
> FirstName and LastName followed by a comparison of what is in between.
>
> For example:
>
> Name 1 matches in Name 2
>  No MI of MN   anything
>  MI   same MI or MN starting with MI or nothing
>  MN   MI = left(MN,1) or same MN or nothing
>
>
> Exactly how to construct this algorithm depends critically on how your
> data is
> stored, and how you define "duplicate names"
>
> On the other hand, if you are looking to answer the question, "do two
> different
> names represent the same person", then a Soundex (or NYSIIS) method might
> be
> better.
>
> http://j-walk.com/ss/excel/tips/tip77.htm
> http://en.wikipedia.org/wiki/New_York_State_Identification_and_Intelligence_System
> --ron

```
 0
Rick
11/28/2009 6:25:39 PM
```On Sat, 28 Nov 2009 13:25:39 -0500, "Rick Rothstein"
<rick.newsNO.SPAM@NO.SPAMverizon.net> wrote:

>Maybe this formula?
>
>=AND(LEFT(A1,FIND(" ",A1)-1)=LEFT(B1,FIND("
>",B1)-1),TRIM(RIGHT(SUBSTITUTE(A1," ",REPT("
>",99)),99))=TRIM(RIGHT(SUBSTITUTE(B1," ",REPT("
>",99)),99)),IF(LEN(A1)-LEN(SUBSTITUTE(A1,"
>",""))=LEN(B1)-LEN(SUBSTITUTE(B1," ","")),MID(A1,FIND(" ",A1&" ")+1,FIND("
>",A1&" ",FIND(" ",A1&" ")+1)-FIND(" ",A1&" ")-1)=MID(B1,FIND(" ",B1&"
>")+1,FIND(" ",B1&" ",FIND(" ",B1&" ")+1)-FIND(" ",B1&" ")-1),TRUE))
>
>--
>Rick (MVP - Excel)

Maybe, but we don't have enough information yet.

One thought, based on only on looking quickly at your formula, is that it only
compares A1 & B1.  My guess would be that we need to compare all of column B
with A1.
--ron
```
 0
Ron
11/28/2009 7:02:18 PM
```>>Maybe this formula?
>>
>>=AND(LEFT(A1,FIND(" ",A1)-1)=LEFT(B1,FIND("
>>",B1)-1),TRIM(RIGHT(SUBSTITUTE(A1," ",REPT("
>>",99)),99))=TRIM(RIGHT(SUBSTITUTE(B1," ",REPT("
>>",99)),99)),IF(LEN(A1)-LEN(SUBSTITUTE(A1,"
>>",""))=LEN(B1)-LEN(SUBSTITUTE(B1," ","")),MID(A1,FIND(" ",A1&" ")+1,FIND("
>>",A1&" ",FIND(" ",A1&" ")+1)-FIND(" ",A1&" ")-1)=MID(B1,FIND(" ",B1&"
>>")+1,FIND(" ",B1&" ",FIND(" ",B1&" ")+1)-FIND(" ",B1&" ")-1),TRUE))
>>
>>--
>>Rick (MVP - Excel)
>
> Maybe, but we don't have enough information yet.
>
> One thought, based on only on looking quickly at your formula, is that it
> only
> compares A1 & B1.  My guess would be that we need to compare all of column
> B
> with A1.

Ahh, yes, you might be right on that. That would probably require a macro
then, I would guess.

--
Rick (MVP - Excel)

```
 0
Rick
11/28/2009 7:43:20 PM

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