How can I replace value at every 1000 line in Excel or Notepad++?

I have 1 lakh records and I want to do query for those records in production ..

so for every 1000 line I want to replace comma with a string value (or tablename.columnname in ())

example

1000) '12345',
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2000)'123431',
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to replace to

1000) '12345')or tablename.columnname in (
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2000)'123431')or tablename.columnname in (
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