59. Databricks Pyspark:Slowly Changing Dimension|SCD Type1| Merge using Pyspark and Spark SQL

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[sohelsayyad]

Informative video... Nd comment section too.
Thanks Raja sir 💐

[awasthi]

Truly appreciate your efforts!!
Can you please share the script which you have used, So that we can do hands on same. ...

[kartikeshsaurkar]

I think video title should change to "how to implement SCD 1 in databricks". It'll reach to larger audience

[rambabuposa]

Hi Raja, nice videos. have gone through all of your videos.
In this video, you have titled like this SCD Type1. As per my knowledge, its Delta Lake with all kinds of history (versions). I think it should be SCD Type2.

[tanushreenagar]

Superb sir now I have cleared this concept

[leviettung]

Hi Raja,
i am also doing upsert with structure streaming into Azure SQL database. Everything is not as it should be. I can upload via connect ODBC on normal connection but not in writeStream. Error that ODBC is not installed (but I do). I upsert with forEach.
Can you give me some advice, many thanks

[joyo]

Great Video for data scientist like me

[pritamsuryavanshi]

Could you make a video on "How to implement SCD 2 using PySpark/Spark SQL in Databricks" ? Thanks.

[surenderraja]

Very Nice . Is it possible to supply the column names dynamically from somewhere. currently the columns names ON condition is hardcoded as id and also the set columns are hardcoded. can we try to pull those columns dynamically from a list or array or config file

[ashishsharan]

what will be the syntax for inserting record manually into Delta lake and dataframe using PySpark

[ashishsharan]

From where I can get the scripts you have shown in the tutorials, I liked them very much

[muvvalabhaskar]

Hi in this example there is only one table
If there are multiple tables with multiple columns and primary key also different for each table how do we generalize this one

[DevelopingI]

Hey Thank you for the video. I am using the Method 1 to Perform Merge on a big table (1TB). It takes 3+ hours to do that.

Can you please suggest how can I improve that?

Also is it possible and advised to perform Merges on Parquet rather than converting these to Delta?

[yogeshgavali]

How can we delete the data which is not in source in same merge statement for pyspark?

[perryliu]

How do we manage if the one of rows in the source table got deleted and we also want to delete this row in the target table?

[ashishsharan]

Do we have SCD type 1 and Type 2 videos in PySpark and Spark SQL ?

[kunalmishra]

Hello
Can you please tell how to change the data type of columns of the created delta table .

For ex : In this video you have created

[sanjaynath]

SCD Type 2 video has been removed or made private? Could you please make it public? Awesome videos!

[JL-qcgq]

How do we update records in db table via jdbc in databricks? I tried read and write (overwrite/append) but not update.

[keerthanavijayakumar]

@rajasdataengineering7585  hi sir,
I have data in RDBM sql(source)
I do some transformation and write that data in postgres db using pyspark. As this job is triggered on an hourly basis and fetching the data form source in 8 hour interval, there are so many duplicates in postgres table how to overcome that. Plsss explain me. Pls