Check if a product was bought in promo or not

[IliasKatsis]

Hello everyone,

I have a dataset with receipts. Each line have a receipt date, a user id which represents ther person who enter the receipt in the system, a receipt id and the general information about every product ( Category id , product id , brand id etc), another fact is that wer know the retailer for every receipt. Every line represents a single product, a sample of the data is like this 

Now i have another table, which represents promo data and is like this:

The objective is to combine this two tables. I want to check that if a product in a specific receipt date was bought in promo or not.

The statements is that the
1.receipt date must be inside the start and end date of the promo

2. the retailer id of the receipt is thr same with the promo

3. of course the product id must be the same in both tables.

Please help me

Thanks

[littlemojopuppy]

@IliasKatsis glad I could help!

[IliasKatsis]

Thanks! Very good!

[littlemojopuppy · Accepted solution]

That would be a really large table.  Instead of combining tables, try creating a measure to determine if a receipt qualifies.

Two steps:

1. FILTER() promo for where Retailer ID matches on both tables, Product ID matches, and receipt date >= promo start date and <= promo end date. 
2. Use COUNTROWS() on that.

If COUNTROWS > 1 then you know it was bought in a promo.

Hope this helps!