How do I fetch information based on customer code and last purchase date

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I have two tables in sql. One records customer information and one records their purchase information. Now I want to show the last purchase of customers who have passed 30 days after their purchase in a table.
Thank you
There is also no relationsship between the tables.
And I use the C # linq method 

I can get the last date of buying one person and Lee has a problem for all customers. I tried many codes and it did not work. The table structure is as follows Customer table: customer code first name and last name And shopping table: customer code Product Name purchase date

What I have tried:

<pre>I tried many codes and it did not work. The table structure is as follows Customer table: customer code first name and last name And shopping table: customer code Product Name purchase date

Posted 14-Apr-21 11:45am

Member 15123964

Updated 14-Apr-21 15:36pm

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Richard MacCutchan 15-Apr-21 5:43am

You state above, "There is also no relationsship between the tables.". But both tables include customer code, so that is the relationship. You need to use the Improve question link below your question, and add complete details, including the code that you have tried.

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Marc Clifton · Accepted Answer · 2021-04-14T15:36:00

Solution 1

Quote:
There is also no relationship between the tables.

If there's no relationship between the customer table and the purchase table, you can't do anything, right? Why would there not be a relationship between the customer and what the customer purchases?

Posted 14-Apr-21 15:36pm

Marc Clifton