Fetching rows from million rows table(Optimization)

by Krishna Kumar S   Last Updated June 12, 2019 08:06 AM

I have millions of rows in a table of Greenplum database out of which I have to fetch around 45k rows and store them in a python List.

It's taking more than 2hrs to fetch the data. How can I optimize the time taken to fetch data?

resultList = []
for(item in list):
  result = SELECT column_1, ... column_n from TABLE WHERE column = item

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