#49. Azure Data Factory - Implement Upsert logic in Mapping data flow.

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Upsert logic is synonymous to Slowly Changing Dimensions Type 1. Based on a key column we will decide whether to insert an incoming row or update it in the sink database. Watch this video to see how do we implement it in ADF. Use the sample file from git repository to try this exercise.

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20 сен 2024

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Комментарии : 52

@thesoftwarefarmer 3 года назад

Alter Row transformation only works with excel files and RDBMS but what if we have to deal with a CSV or TSV files?

@Myachnik 2 года назад

Thanks a lot! You help me :)

@monibodhuluru6267 Год назад

What if we don't have id / unique columns? How can we achieve using composite key (adding multiple columns in alter row?

@RodrigoZenga 2 года назад

This is Awesome! tks for teaching us What about if my data source is a Paginated API JSON File ?

@sreeg9662 2 года назад

what is the stage that you have used to copy xls ?. beging step is missing .

@Lihka080 3 года назад

Hi Mam, suppose I have 1 lakh records in the initial load, later I have added 2000 records to source data and no changes happened to 1 lakh, so what will be the result of your pipeline. In the second run, will it perform insert/update operation for 1 lakh records or will it ignore and perform insert operation for the latest 2000 records

@overlord7096 4 месяца назад

In sink diectly you are doing upsert rhen why you are using alter row activity?

@AllAboutBI 4 месяца назад

It's not possible to implement without alter row transformation if we got to update something

@RajeevKumar-zf8ox 3 года назад

Nice with SCD Type -1 Implementation. Could you please upload the video for SCD Type-2 implementation. How to maintain the history.

@AllAboutBI 3 года назад

Sure.

@RajeevKumar-zf8ox 3 года назад

In case of incremental load, if there are suppose 70 columns , how will you compare and find the change. When I answered in the interview, that with the help of where clause comparing each columns to detect the change, the interviewer was not satisfied. If you could please help how to handle such scenarios?

@AllAboutBI 3 года назад

Hashing could be the expectation in that case. Hash function can find out if the columns have changed or not

@harikrishna-el7so 4 года назад

hi its worth watching ,,pls can u share m the azure synapse analytics videos

@AllAboutBI 4 года назад

sure, I will do it once the ADF is done.

@codeworld8981 3 года назад

Can i implement scd1 and scd2 in same dataflow? Pls let me know

3 года назад

Please, if you find the solution, let me know

@AllAboutBI 3 года назад

I don't think it's possible in one data flow

@codeworld8981 3 года назад

@@AllAboutBI If we implement these in separate dataflow pls let me know how to do it.

@pamilad5473 2 года назад

Assume there is no primary key column in source data...then how should perform upsert logic?

@overlord7096 4 месяца назад

You need make composite key which will be concatenation of 2 or 3 columns.

@vrukshalikapdekar4627 3 года назад

Superb 👍

@AllAboutBI 3 года назад

Thanks 🙏

@sivaramkodali8282 3 года назад

Can we pass sno as parameter? I want to upsert multiple files with parameters.

@vivekk9564 3 года назад

I am trying to create parameterized data flow where Source & Target are dynamic and I achieved with simple Allow Insert and Recreate table options in Target Settings. But I need to implement Upsert logic for the same and I believe it requires Key Columns also to be parameterized which I am unable to do. Can you please suggest?

@rodrigonicolastamarizcasti5279 Год назад

Can you find an answer to this?

@tipsandhacksbygaurav Год назад

Have you used dynamic join fields, exactly same manner. Refer this one - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CMOPPie9bXM.html

@ksowjanya4488 Год назад

Howto implement this with dataverse dataflow?

@srikanthbachina7764 3 года назад

Hi instead of role based mapping we can use auto mapping for drifting columns right

@AllAboutBI 3 года назад

Yes. Rule based mapping helps for type casting.

@edwinraj2652 3 года назад

Hi, Thanks for the Video. Is this Upsert logic, works for Cosmos DB. When choosing Cosmos in the Sink, Key columns property is not available for Cosmos.

@AllAboutBI 3 года назад

It does support Cosmos db as sink. Haven't you set any key while creating the Cosmos db container/table?

@edwinraj2652 3 года назад

@@AllAboutBI Yeah, it is working. previously I dont have an id field defined. Now it's working fine. Can you post a video about implementing SCD type 2 in cosmos?

@balamuralipati8604 3 года назад

@@edwinraj2652 where is the option for defining key ? i can see only unique key. But i want to upsert based on composite key?

@edwinraj2652 3 года назад

@@balamuralipati8604 Upserts in Cosmos works based on 'id' property. It's the default behaviour , we dont need to choose the 'id' property in adf sink.

@balamuralipati8604 3 года назад

@@edwinraj2652 how would data factory know which rows to update.. ? If i am trying to upsert an excel file, it has two columns col1,col2 and cosmos has id, col1, col2, then how does the update happen?

@preetijaiswal9089 3 года назад

Hi, I need to implement upsert in sql server using ADF, How to implement that either by copy activity or Data flow. In mapping data flow sql server is not supported. so how to do this?

@Mayank612722 3 года назад

If your source and sink are SQL, why don't you just implement using SQL Query?

@preetijaiswal9089 3 года назад

Yeah i can surely do that.. but i need to automate the process and migtate around 70-80 tables and that too using adf so that's why

@Mayank612722 3 года назад

@@preetijaiswal9089 If you're talking about moving data from on prem to cloud SQL, you can use a lookup to get all the names of tables in the database and then on its output you can run SELECT * INTO. I'm pretty sure this might not be the best way though.

@preetijaiswal9089 3 года назад

@@Mayank612722 this is for migration i need to do Update or Upsert.

@Mayank612722 3 года назад

@@preetijaiswal9089 Oops, I read mitigate as migrate.

@raghunandan3068 4 года назад

Thanks for this Video! As per my understanding from this video, when doing an UPDATE, it will update all the data point in the record though it is not changed. Is there a way not to UPDATE the unchanged data points. Thanks..

@AllAboutBI 4 года назад

Yes, correct👍

@raghunandan3068 4 года назад

Could you pls, put up a video for this. Thanks in advance. when there is record are less it may not impact, however if is million of record updating the same value again, may be too costly. Request you to post a video, on how to overcome this.