Numbers: Reducing a list to unique rows

My end goal here is a text based table that lists all the Artists I have in my iTunes Library, and all the albums I have for each Artist.
I'm off to a great start after exporting my Library using Export in iTunes, using Unicode Text and subsequently importing into Numbers.
What I had at first was a table with 5896 rows (one for each Song) and many columns (one for each data type/descriptor in iTunes). I have reduced the columns to four (A-D) "Artist Album Genre Year". And that's perfect for my needs.
What I am unable to do now is reduce the duplicate rows to a single row per Album. If an Album had ten songs, I now have ten rows that have the same Artist Album Genre Year.
14 rows for "AC/DC Live Rock 1992"
10 rows for "AC/DC Back in Black Rock 1985"
11 rows for "AC/DC Ballbreaker Rock 1995"
and so on.
When I am complete, I should have one row per Album (528 rows).
"AC/DC Live Rock 1992"
"AC/DC Back in Black Rock 1985"
"AC/DC Ballbreaker Rock 1995"
and so on.
I assume there is going to be logic used to check each row for repetition and then perhaps return a True/False, where I can subsequently filter on all the False returns or something similar.
I am fairly new to Numbers but fluent with Excel, so I can handle the logic but maybe not the button-pushes or menu operations within Numbers itself.
I'm happy to experiment so suggestions and partial solutions are welcome, we need not hit a home-run in a single reply.
Thank you,
ERK

And if you're having trouble getting the formula in Table 2 to work you can also consider a more "low-tech" approach.
1. Create a new blank table.
2. Set a filter on the Counter column so only the rows with a value there are visible.
3. Select the cells that are visible after the filter is applied and command-c to copy.
4. Click once in a cell in the new blank table and command-v to paste. .
You can then delete the Counter column (or simply not select it in step 3).
SG

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select 'jimmy', 'bert', '1' from dual union all
select 'sam', 'mac', '1' from dual union all
select 'sam', 'knight', '1' from dual union all
select 'tom', 'sand', '1' from dual union all
select 'cat', 'mud', '1' from dual
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FROM
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                FROM
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WHERE
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AND rn1 =1 ;
FIRSTNAME       LASTNAME        AREA
bob             james           1
cat             mud             1
jimmy           bert            1
sam             knight          1
tom             sand            1
SQL>

Numbers: Reducing a list to unique rows

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