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1326.Advanced search and replace -- How to substract one csv file from another according to value of column A?

User: Michelle Lyles -- 2015-11-21          << 1325  1327 >>
Hits: 1239
Type: Advanced search and replace   
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I have two csv files (each file contains about 6000 rows and 20 columns). One file is a database of products from the August Catalog. The other file is a database of products from the November Catalog. Column A of both files contains product sku numbers. I would like to subtract the August Catalog from the November Catalog. The resulting csv file will contain only new products.
Input Sample:
August, Catalog:
123, name1, html-1
456, name2, html-2
Aa456, name3, html-3
Aa789, name4, html-4
aa-123, name5, html-5
aa-456, name6, html-6

November, Catalog:
789, new1, html-a
123, name1, html-1
456, name2, html-2
Aa456, name3, html-3
new123, new2, html-b
Aa789, name4, html-4
aa-123, name5, html-5
aa-456, name6, html-6
new-001, name, html-c
Output Sample:
New Product Catalog:
789    new1  html-a
new123 new2  html-b
new-001 name html-c
Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.
Assume two files are, they are comma separated.
1. ctrl-o open Nov.csv
2. ctrl-h open 'replace' dialogue
* set 'replace unit' to 'Line'
* set 'If' to:

* click 'advanced' tab, set 'run following at the beginning of replace' to:

3. click 'replace', done.
4. ctrl-s save to file.

Note: in step 2 file folder separater should be double backslash like d:\\test\\Aug.csv.

Screenshot 1:  Replace_Window

Screenshot 2:  Replace_Advanced_Window

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