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1/10/20 12:31 PM

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Hi Everyone,

I would like to build an ETL process using T-SQL to read data from various data sources and perform data cleasing, aggregation, etc..

This ETL process runs several times each month and move data from Source systems to a SQL DWH (SQL 2016 DB).

The ETL will do the following:

1-Read data from Source SQL tables.

2-Insert Data in Staging tables

3-Perform aggregation

4-Delete/truncate data from Final tables

5-Insert new data in Final tables

6-generate error log, rollback mechanism etc..


1) How many tables involved?

- 10 tables to read from

2) What is the Final destination?

- a single Fact table in the DWH, several Dimension tables

3) what do we want to accomplish?

- A process to read data from source and populate fact, dimension table

4) How do you want the process to run?

- interactively like: "exec ETL_process "

Must have:

1) The process will be divided in steps and will display a message after each step like that

"Step 1: Load employee data completed" for instance.

2) If the ETL process is divided to 20 steps for instance and we run into errors at Step 14. I should be able to restart the process from Step 14 once the issue fixed. Meaning I don't want to rollback the entire 14 steps rather I would like to do something like :

"exec ETL_process Stp 14"

This will restart the process from where it failed.

Nice to have:

-Be able to run the procedure from a GUI/Web interface.

-Be able to convert this SP to a SSIS package to be part of SQL job

Ideally you are:

-Very familiar and comfortable with writing SQL code

-Have been engaged in DWH project in the past involving data movement/validation and can share best practices.