删除重复的Excel-每天

Question

I have a spreadsheet with columns of the following records:

• Caller ID (Customer's number each call came from)
• Date (the dates are when the calls came in since January 1 2017)

How can I efficiently remove duplicate Caller ID's within each day?

If I simply use the Remove Duplicates tool, it will remove duplicates across the entire year so far.

So I pretty much want to remove instances where a customer called more than once in a day.

Here is an example of the data.

How can I make it so only the first record from each day shows?

My actual sheet has over 100k rows

Answer 1

Why delete the duplicates? Just create a pivot table and it can show the unique values and a count of the duplicates.

Answer 2

Remove duplicates tool should work, Are you sure you have only those 2 columns (number and date) ticked in the Remove duplicates tool?

If not, check the date format

Answer 3

A quick and dirty solution:

Assuming the data is sorted (ascending) by the date to begin with, you could do a primary sort on date and secondary sort on phone numbers. In an empty column, enter the following formula =(b2-b1)+(c2-c1) (where phone is column b, date is column c and row 2 is your first row of data. Copy and paste to last row of data. Now filter that column for 0 only and then hide or delete those rows.

Now if the data wasn't already sorted by date, and you need it restored to the original order, you could first add a column for a numeric order (ie 1,2,3) with formulas. First row (Row 2) of data is a 1, next row is a formula (=a2+1) and copy and paste that to the last row. Now when you run the above process, you would delete the rows with zeroes, then run a final sort on Column A to get back to the original order.

Hope that helps. If this is a one-time thing that should suffice. If not, a macro could do the same thing and shouldn't be too hard to write. Or you could leave the extra columns in place or just hide them, for future use.