how to fix below question in azure sql data base i am already created table

Question

Req 8: Crate a pipeline to move data from on premises CCardTrans table into Azure SQL DB by creating a new table, when pipeline runs for the first it has to move all the rows from the source table, but if you rerun the same pipeline it should not process any rows from source table?

Answer 1

Hi @subhashini panidepu

It sounds like you're looking to create an Azure Data Factory pipeline that can move data from your on-premises CCardTrans table to an Azure SQL Database, with specific behavior for first-time and subsequent runs. Here’s a step-by-step approach you can follow:

Create your Azure Data Factory pipeline:

• Use the Azure portal to create a new Data Factory if you don’t have one yet.
  • Open Azure Data Factory and create a new pipeline.
  Add a Copy Data activity:

  - Within your pipeline, add the "Copy Data" activity.
  
     - Set up your source to connect to your on-premises SQL server and your `CCardTrans` table.
  
     **Specify the sink**:
  
        - For the destination, select your Azure SQL Database and specify the new table you created for the data.
  
        **Set up the first-time data load**:
  
           - You can use a parameter to check if this is the first run.
  
              - In the copy activity settings, you might want to add a condition such that it only copies data if the parameter indicates a first-time load (e.g., a certain flag in the database or a specific value in a control table).
  
              **Prevent duplicate processing on re-runs**:
  
                 - Implement a mechanism to track processed records. This can be done using a control table in your Azure SQL Database.
  
                    - On subsequent runs, the pipeline should check against this tracking table to know which records have already been processed and avoid re-processing them.
  
                       - You can achieve this by adding a "Lookup" activity before the "Copy Data" activity to ensure only new records from `CCardTrans` are selected for load.
  
                       **Testing**:
  
                          - Test the pipeline to ensure it behaves as expected. Initially, ensure it pulls all records, and on subsequent executions, confirm that it only processes new records.
  

I hope this helps you set up your Data Factory pipeline properly! If you have specific error messages or issues during the setup, feel free to share, and I can help troubleshoot those as well!

Follow-Up Questions:

• What tools or services are you currently using to connect to your on-premises SQL Server?
• Do you have a control table or mechanism in place to track processed records?
• Are you encountering any specific issues or error messages during your pipeline setup?

Relevant Documentation:

• Get started with Azure Data Factory
• Copy data tool in Azure Data Factory
• Use parameters in Azure Data Factory
• Data movement in Azure Data Factory