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Data Engineering
Join discussions on data engineering best practices, architectures, and optimization strategies within the Databricks Community. Exchange insights and solutions with fellow data engineers.
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Forum Posts

Qarol
by New Contributor
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Work around for The method `pd.groupby.GroupBy.prod()` is not implemented yet.

0I have a database with two columns: name (str) and probability (float).I am running this command:df[['name','probability']].groupby('name').prod()on a Databricks (runtime 7.3) notebook and df is a koalas dataframe.The error I get is:PandasNotImpleme...

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alenka
New Contributor II
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The same trouble  

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PrebenOlsen
by New Contributor III
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GroupBy in delta live tables fails with error "RuntimeError: Query function must return either a Spark or Koalas DataFrame"

I have a delta live table that I'm trying to run GroupBy on, but getting an error: "RuntimeError: Query function must return either a Spark or Koalas DataFrame". Here is my code:@dlt.table def groups_hierarchy():   df = dlt.read_stream("groups_h...

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Vidula
Honored Contributor
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Hi @Preben Olsen​ Does @Debayan Mukherjee​  response answer your question? If yes, would you be happy to mark it as best so that other members can find the solution more quickly?We'd love to hear from you.Thanks!

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Anonymous
by Not applicable
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Resolved! Converting between Pandas to Koalas

When and why should I convert b/w a Pandas to Koalas dataframe? What are the implications?

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Ryan_Chynoweth
Honored Contributor III
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Koalas is distributed on a Databricks cluster similar to how Spark dataframes are also distributed. Pandas dataframes only live on the spark driver in memory. If you are a pandas user and are using a multi-node cluster then you should use koalas to p...

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