Join using not exists
Hello everyone,
i have a two data sets and using the join recipe. I want the dataset to be populated as such :
keep only those records which are available in only in dataset1 (say left hand side) and not available in dataset 2.
I used the join condition of the two datasets' common column using "join on" as is different . But the operation is running long time . Yes its a huge dataset with 500k records.
Is there any fastest way to get such kind of results?
Best Answer
Answers
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Manuel Alpha Tester, Dataiker Alumni, Dataiku DSS Core Designer, Dataiku DSS ML Practitioner, Dataiku DSS Core Concepts, Dataiku DSS Adv Designer, Registered Posts: 193 ✭✭✭✭✭✭✭Why not do a left Join on (dataset1, dataset2) followed by a Prepare recipe that deletes all records with data on a column originally from dataset2?
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Ankur5289 Partner, Dataiku DSS Core Designer, Dataiku DSS & SQL, Dataiku DSS Core Concepts, Registered Posts: 27 Partner
Great, this worked,
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Manuel Alpha Tester, Dataiker Alumni, Dataiku DSS Core Designer, Dataiku DSS ML Practitioner, Dataiku DSS Core Concepts, Dataiku DSS Adv Designer, Registered Posts: 193 ✭✭✭✭✭✭✭
Great
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Ashley Dataiker, Alpha Tester, Dataiku DSS Core Designer, Registered, Product Ideas Manager Posts: 163 DataikerHi @Ankur5289
,We've recently released a new version of Dataiku, 11.3, and you can now add additional output datasets to a Join recipe that contain all the unmatched rows from either a left, right, or inner join. This will let you create a dataset with only the rows that, for example, are in the left dataset and not in the right one.
Anti-joins/exclusion joins are on our roadmap.
Cheers,
Ashley