## Filter unique values and sort based on adjacent date

The formula in cell F3 extracts unique values from column C, the formula in cell F3 extracts the corresponding dates from column B.

**Formula in E3:**

copied down as far as necessary.

**Array formula in F2:**

copied down as far as necessary.

### Explaining formula in cell E3

#### Step 1 - Get frequency of each value

The COUNTIF function counts values based on a condition or criteria. We are looking for unique values that is why we compare the array with 1.

COUNTIF($C$3:$C$22,$C$3:$C$22)=1

becomes

COUNTIF({"BB"; "VV"; "WW"; "BB"; "DD"; "KK"; "YY"; "UU"; "LL"; "WW"; "PP"; "CC"; "VV"; "MM"; "EE"; "WW"; "KK"; "TT"; "II"; "PP"}, {"BB"; "VV"; "WW"; "BB"; "DD"; "KK"; "YY"; "UU"; "LL"; "WW"; "PP"; "CC"; "VV"; "MM"; "EE"; "WW"; "KK"; "TT"; "II"; "PP"})=1

becomes

{2;2;3;2;1;2;1;1;1;3;2;1;2;1;1;3;2;1;1;2}=1

and returns

{FALSE; FALSE; FALSE; FALSE; TRUE; FALSE; TRUE; TRUE; TRUE; FALSE; FALSE; TRUE; FALSE; TRUE; TRUE; FALSE; FALSE; TRUE; TRUE; FALSE}

#### Step 2 - Check previous values to prevent duplicate values in output list

COUNTIF($F$2:F2,$C$3:$C$22)=0

becomes

COUNTIF("Date", {"BB"; "VV"; "WW"; "BB"; "DD"; "KK"; "YY"; "UU"; "LL"; "WW"; "PP"; "CC"; "VV"; "MM"; "EE"; "WW"; "KK"; "TT"; "II"; "PP"})=0

becomes

{0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0}=0

and returns

{TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE}

#### Step 3 - Multiply arrays

We multiply the arrays because both conditions must be met.

((COUNTIF($C$3:$C$22,$C$3:$C$22)=1)*(COUNTIF($F$2:F2,$C$3:$C$22)=0))

becomes

{FALSE; FALSE; FALSE; FALSE; TRUE; FALSE; TRUE; TRUE; TRUE; FALSE; FALSE; TRUE; FALSE; TRUE; TRUE; FALSE; FALSE; TRUE; TRUE; FALSE}*{TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE; TRUE}

and returns

{0;0;0;0;1;0;1;1;1;0;0;1;0;1;1;0;0;1;1;0}.

#### Step 4 - Divide 1 with array

This step makes sure that FALSE will become #DIV/0!. The LOOKUP function ignores errors and that will be very useful for us.

1/((COUNTIF($C$3:$C$22,$C$3:$C$22)=1)*(COUNTIF($F$2:F2,$C$3:$C$22)=0))

becomes

1/{0;0;0;0;1;0;1;1;1;0;0;1;0;1;1;0;0;1;1;0}

and returns

{#DIV/0!; #DIV/0!; #DIV/0!; #DIV/0!; 1; #DIV/0!; 1; 1; 1; #DIV/0!; #DIV/0!; 1; #DIV/0!; 1; 1; #DIV/0!; #DIV/0!; 1; 1; #DIV/0!}

#### Step 5 - Return value

LOOKUP(2,1/((COUNTIF($C$3:$C$22,$C$3:$C$22)=1)*(COUNTIF($F$2:F2,$C$3:$C$22)=0)),$B$3:$B$22)

becomes

LOOKUP(2,{#DIV/0!; #DIV/0!; #DIV/0!; #DIV/0!; 1; #DIV/0!; 1; 1; 1; #DIV/0!; #DIV/0!; 1; #DIV/0!; 1; 1; #DIV/0!; #DIV/0!; 1; 1; #DIV/0!},$B$3:$B$22)

and returns

8/23/2008 in cell E3.

### Download Excel *.xlsx file

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### 10 Responses to โFilter unique values and sort based on adjacent dateโ

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Hi,

Just found the site and wow! I've already fixed a few sloppy problems in some my work spreadsheets.

Sorry in advance if this is the wrong way to ask a question.

But this page is the closet I've found to what I am trying to do. I have a table with four columns, Date, Name, Level, and outcome. The range is from row 3 to row 1000.

What I need to be able to do is look at today's date. Determine the month and year and then look up all the values in the date column that match the month and year. I've been trying to get it to work with sumproduct but I can't wrap my head around it.

Then on a separate tab list all the unique events for that month.

So one the seperate tab it would show something like this:

May 2/2010 Bob Smith 3 Requires Attention

May 5/2010 Jim Smith 1 Out of Service

Hope you are able to help. Thanks in advance.

Dave,

see this post: https://www.get-digital-help.com/2010/05/05/list-all-the-unique-events-for-a-month-in-excel-array-formula/

Thanks! Works like a treat

I am trying to filter dates (with days) using month and year as follows:

=SUMIFS('DATA INPUT'!$C$3:$C$5000,TEXT('DATA INPUT'!$B$3:$B$5000, "yyyy-mmm"),TEXT(E$1,"yyyy-mmm"),'DATA INPUT'!$D$3:$D$5000,"Pilsner",'DATA INPUT'!$E$3:$E$5000,"Beer pack")

- Column "C" is what I would like to sum

- Column "B" is the dates I am TRYING to filter using E1 (inputted month)

- Column "D" and "E" are standard text to be filtered

I have tried playing with the concepts above but to no avail, any ideas? I would like to avoid VBA, etc.

Chris,

Array formula in F1:

Your formula:

becomes

Entered as an array formula.

I may be a bimbo, but I can't figure this out. I have five rows that need to change, sorted by date from the first row.

here are my row names: due date, author, title, changes, date completed

I want the due dates to all be in order, changing the corresponding columns.

HELP a homegirl out! PLEASE!

oh and i have a MAC.

amber,

Is this what you had in mind?

Sort from left to right

Hi

I've gotten this to partially work. The problem is my data is split over 4+ columns. So Column A would be Columns S,AA,AI,etc and column B is Columns O,W,AE,etc.

This works:

Date (S2:S21)

Values (O2:O21)

But when I try to add other columns to the named ranges it doesn't like it. This doesn't work:

Data (S3:S42,AA3:AA24)

Values (O3:O42,W3:W24)

Thanks

Laura,

you are right, it does not work. I donยดt have a solution for you.