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Comparing Columns , Arrays, List using SQL, Numpy or Python List. Would Intertools be valid alternative and faster?

I have two table in SQL tModel which has 9 columns (ID, Date N1, N2, N3, N4, N5, N6, Flag) and 300 million rows tPairAP which has 3 columns (ID, N1, N2) and 750 rows The task I need to to perform is ...
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