Need help with this fromula

Hi Anonymous ，

For the problem you are experiencing, the use of temporary tables can solve your needs. Temporary tables can be used to dynamically adjust quantities and calculate new price values without changing the original data.

Below is an example of my data that I hope will help you.

1.declaration of percentage change variables, e.g., 5 per cent increase

DECLARE @percentage_change DECIMAL(5, 2) = 0.05;

2.Creation of temporary tables to adjust quantities

CREATE TABLE #adjusted_records (
   id INT,
   adjusted_quantity DECIMAL(10, 2),
   category INT,
   month INT
);

 3.Insert the adjusted data into the temporary table

INSERT INTO #adjusted_records (id, adjusted_quantity, category, month)
SELECT
   id,
   quantity * (1 + @percentage_change),
   category,
   month
FROM
   records;

4.Use the temporary table to calculate the new values and summarize

WITH computed_values AS (
   SELECT
       ar.id,
       ar.adjusted_quantity,
       pe.price,
       (ar.adjusted_quantity * pe.price) AS new_value
   FROM
       #adjusted_records ar
   JOIN
       price_entry pe
   ON
       ar.month = pe.month AND ar.category = pe.category
)
SELECT
   SUM(new_value) AS total_sum
FROM
   computed_values;
-- Drop the temporary table
DROP TABLE #adjusted_records;

If you have any other questions, I've found the following document to help you out, and I hope it helps.

Temporal tables - SQL Server | Microsoft Learn

Hope it helps!

Best regards,
Community Support Team_ Tom Shen

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Hi,

I am trying to do something for a project and am having immense trouble. So I have an SQL file with over 7,000,000 records, and some of them contain weights, which are labeled as quantity. These same records with quantity also are classificied into 4 different categories. These four categories all cost different amounts every month, so I have a seperate excel file titled price entry with 48 rows, one seperate price for each month of each classification. I am trying to take the individual quantities and multiply them all by a selected  increase/decrease value, and then take those new quantity values and have that new quantity number multiply by one of the 48 price values in the table and then sum the new price into one easy measure. I currentl;y have been able to do it in columns but the problem is I am unable to change the quantity at all the way id like to in a table. Is there a way to make a measure that can do this?

Basically 

((Quantity Value) * (1 + % change)) * (one of 48 price values based on month and one of the 4 criteria values) 

and then have the final value be a sum of all the new prices with the applied % change and price for month and criteria.

Thanks!