SQL Transform for Customers With No Invoice Dated 2 Years Prior to Current Year
I have developed an ETL dataflow that outputs our gross margins per job. I have then used this dataflow to create cards that show total gross margins by customer. What I am looking for is to start from this exact same ETL flow but output only customers that have not had invoices in the 2 years prior to current year - so currently, that would be 2019 and 2018.
I've tried to create a new ETL transform with the first transform as input but I can't figure out how to filter out the customers that have had invoices in past 2 years. Is this something that must be done through an SQL transform or is there a way through ETL? I am very weak at SQL and just okay at ETL.
Sample Input Data | Desired Output Data | |||||
Customer | Job GM | Invoice Date | Customer | Job GM | Invoice Date | |
Cust1 | 1000 | 01/15/20 | Cust2 | 500 | 01/08/20 | |
Cust1 | 5000 | 08/31/19 | Cust2 | 7000 | 12/15/17 | |
Cust1 | 3000 | 06/15/13 | Cust2 | 7000 | 12/15/17 | |
Cust2 | 500 | 01/08/20 | Cust3 | 1000 | 12/31/16 | |
Cust2 | 7000 | 12/15/17 | Cust3 | 5000 | 12/31/16 | |
Cust2 | 7000 | 12/15/17 | Cust5 | 1000 | 01/01/20 | |
Cust3 | 1000 | 12/31/16 | ||||
Cust3 | 5000 | 12/31/16 | ||||
Cust4 | 6000 | 04/05/19 | ||||
Cust5 | 1000 | 01/01/20 |
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