I have two tables (postgres database)-
table1 has three columns (part_number, scrap_code, scrap_lbs)
table2 has three columns (fk_part_number, fk_scrap_code, operation_code)
When I SUM() the scrap_lbs column from table1, without joining table2; I get the expected values.
But, I need to have the operation_code in the resulting query.
When I JOIN table2, it appears to multiple the sum of the scrap_lbs by the number of rows with the operation_code. (So, I know where the larger value is being derived).
Here is my code:
SELECT part_number, scrap_code, SUM(scrap_lbs) AS Total, operation_code
ON table1.part_number = table2.part_number
WHERE operation_code = (SELECT operation_code FROM table2 WHERE
fk_scrap_code = scrap_code AND fk_part_number = part_number GROUP BY operation_code)
GROUP BY date_slot, part_number, scrap_code, operation_code;
Thank you- Robert-