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# ask-community
y

Yamamoto Hironori

05/21/2023, 8:30 AM
Hi, I wonder if which should I use
op
or
asset
For example, which should I use to build a pipeline to load data from DB and run CTAS queries based on the loaded tables (i.e. ELT pipeline)? I suppose that
asset
is enough to do some complex things as well as
op
. So I do not understand the good case to use
op
Thanks in advance.
o

owen

05/22/2023, 5:11 PM
hi @Yamamoto Hironori! It sounds like assets would be a good fit for your use case, but here's a bit more info on when to use ops vs assets: https://docs.dagster.io/guides/dagster/enriching-with-software-defined-assets#when-should-i-use-software-defined-assets.
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y

Yamamoto Hironori

05/23/2023, 2:24 AM
Thank you! The document helps me a lot!
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