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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

ss6
by New Contributor II
  • 2327 Views
  • 1 replies
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Resolved! Liquid Cluster - SHOW CREATE TABLE error

We've got this table with liquid clustering turned on at first, but then we switch off with below command.ALTER TABLE table_name CLUSTER BY NONE;Now, our downstream process that usually runs "SHOW CREATE TABLE" is hitting a snag. It's throwing this e...

  • 2327 Views
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Latest Reply
Ayushi_Suthar
Databricks Employee
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Hi @ss6 , Hope you are doing well!  We would like to inform you that currently, SHOW CREATE TABLE is not supported after running ALTER TABLE CLUSTER BY NONE. This is a known issue and our Engineering team is prioritizing a fix to retain the clusterin...

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isaac_gritz
by Databricks Employee
  • 25518 Views
  • 2 replies
  • 2 kudos

Using Plotly Dash with Databricks

How to use Plotly Dash with DatabricksWe recommend checking out this article for the latest on building Dash Applications on top of the Databricks Lakehouse.Let us know in the comments if you use Plotly and if you're planning on adopting the latest i...

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  • 2 replies
  • 2 kudos
Latest Reply
dave-at-plotly
New Contributor III
  • 2 kudos

Hey all.  Just wanted to make sure everyone had some up-to-date intel regarding leveraging Plotly Dash with Databricks.Most Dash app integrations w Databricks today leverage the Databricks Python SQL Connector.  More technical details are available v...

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exilon
by New Contributor
  • 2137 Views
  • 0 replies
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DLT streaming with sliding window missing last windows interval

Hello, I have a DLT pipeline where I want to calculate the rolling average of a column for the last 24 hours which is updated every hour.I'm using the below code to achieve this:       @Dlt.table() def gold(): df = dlt.read_stream("silver_table")...

Data Engineering
dlt
spark
streaming
window
  • 2137 Views
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CaptainJack
by New Contributor III
  • 3388 Views
  • 2 replies
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File arrival trigger customization

Hi all. I have workflow which I would like to trigger when new file arrive. Problem is that in my storage account, there are few different types of files. Lets assume that I have big csv file and small xlsx mapping file. I would like to trigger job, ...

  • 3388 Views
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Latest Reply
feiyun0112
Honored Contributor
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option pathGlobFilter or fileNamePatternhttps://docs.databricks.com/en/ingestion/auto-loader/options.html 

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alxsbn
by Contributor
  • 2503 Views
  • 0 replies
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Compute pool and AWS instance profiles

Hi everyone,We're looking at using the compute pool feature. Now we're mostly relying on all-purpose and job compute. On these two we're using instance profiles to let the clusters access our s3 buckets and more.We don't see anything related to insta...

  • 2503 Views
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JakeerDE
by New Contributor III
  • 7394 Views
  • 3 replies
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Resolved! Databricks SQL - Deduplication in DLT APPLY CHANGES INTO

Hi @Retired_mod,We have a kafka source appending the data into bronze table and a subsequent DLT apply changes into to do the SCD handling. Finally, we have materialized views to create dims/facts.We are facing issues, when we perform deduplication i...

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Latest Reply
JakeerDE
New Contributor III
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Hi @Palash01 Thanks for the response. Below is what I am trying to do. However, it is throwing an error. APPLY CHANGES INTO LIVE.targettable FROM ( SELECT DISTINCT * FROM STREAM(sourcetable_1) tbl1 INNER JOIN STREAM(sourcetable_2) tbl2 ON tbl1.id = ...

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sumitdesai
by New Contributor III
  • 4706 Views
  • 1 replies
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Job not able to access notebook from github

I have created a job in Databricks and configured to use a cluster having single user access enabled and using github as a source. When I am trying to run the job, getting following error-run failed with error message Unable to access the notebook "d...

  • 4706 Views
  • 1 replies
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Latest Reply
ezhil
New Contributor III
  • 0 kudos

I think you need to link the git account with databricks by passing the access token which is generated in githubFollow the document for reference: https://docs.databricks.com/en/repos/get-access-tokens-from-git-provider.htmlNote : While creating the...

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cltj
by New Contributor III
  • 4069 Views
  • 1 replies
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Managed tables and ADLS - infrastructure

Hi all. I want to get this right and therefore I am reaching out to the community. We are using azure, and currently are using 1 Azure Data Lake Storage for development, and 1 for production. These are connected to dev and prod databricks workspaces....

  • 4069 Views
  • 1 replies
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Latest Reply
ossinova
Contributor II
  • 0 kudos

I recommend you read this article (Managed vs External tables) and answer the following questions:do I require direct access to the data outside of Azure Databricks clusters or Databricks SQL warehouses?If yes, then External is your only optionIn rel...

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Marcin_U
by New Contributor II
  • 2982 Views
  • 1 replies
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AutoLoader - problem with adding new source location

Hello,I have some trouble with AutoLoader. Currently we use many diffrent source location on ADLS to read parquet files and write it to delta table using AutoLoader. Files in locations have the same schema.Every things works fine untill we have to ad...

  • 2982 Views
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Latest Reply
Marcin_U
New Contributor II
  • 0 kudos

Thanks for the reply @Retired_mod . I have some questions related to you answer.Checkpoint Location:Does deleteing checkpoint folder (or only files?) mean that next run of AutoLoader will load all files from provided source locations? So it will dupl...

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oussValrho
by New Contributor
  • 9417 Views
  • 0 replies
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Cannot resolve due to data type mismatch: incompatible types ("STRING" and ARRAY<STRING>

hey i have this error from a while : Cannot resolve "(needed_skill_id = needed_skill_id)" due to data type mismatch: the left and right operands of the binary operator have incompatible types ("STRING" and "ARRAY<STRING>"). SQLSTATE: 42K09;and these ...

  • 9417 Views
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essura
by New Contributor II
  • 3686 Views
  • 1 replies
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Create a docker image for dbt task

Hi there,We are trying to setup up a docker image for our dbt execution, primarily to improve execution speed, but also to simplify deployment (we are using a private repos for both the dbt project and some of the dbt packages).It seems to work curre...

  • 3686 Views
  • 1 replies
  • 1 kudos
vijaykumar99535
by New Contributor III
  • 3082 Views
  • 1 replies
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How to create job cluster using rest api

I am creating cluster using rest api call but every-time it is creating all purpose cluster. Is there a way to create job cluster and run notebook using python code?

  • 3082 Views
  • 1 replies
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Latest Reply
feiyun0112
Honored Contributor
  • 0 kudos

job_cluster_key string [ 1 .. 100 ] characters ^[\w\-\_]+$ If job_cluster_key, this task is executed reusing the cluster specified in job.settings.job_clusters.Create a new job | Jobs API | REST API reference | Databricks on AWS

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William_Scardua
by Valued Contributor
  • 4107 Views
  • 1 replies
  • 1 kudos

groupBy without aggregation (Pyspark API)

Hi guys,You have any idea how can I do a groupBy without aggregation (Pyspark API)like: df.groupBy('field1', 'field2', 'field3') My target is make a group but in this case is not necessary count records or aggregationThank you  

  • 4107 Views
  • 1 replies
  • 1 kudos
Latest Reply
feiyun0112
Honored Contributor
  • 1 kudos

df.select("field1","field2","field3").distinct()do you mean get distinct rows for selected column?

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