How do I write SQL query to get the sales information

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The table should list several purchases made by few customers.
I have table
customer( customer_id, name, adress)
painting ( paint_id, artist_id, title)
sales( sl_id, customer_id, paint_id)
I need ( name, title)
Where there are 5 customers who have made 15 purchases.

What I have tried:

I tried
select name, paint_id
from customers
inner join sales ON paint_id = paint_id

Posted 8-May-20 2:56am

Zaidf

Updated 8-May-20 4:53am

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Richard MacCutchan 8-May-20 8:58am

And what happened?

F-ES Sitecore 8-May-20 10:45am

Google how to use the "having" clause.

[no name] 8-May-20 10:49am

"Where there are 5 customers who have made 15 purchases":
So you are interested first in the purchases of the customer
-> JOIN the sales table with customer table
In case you are finally also interested in the paint table details
-> JOIN table painting to the above joined sales table

Zaidf 8-May-20 11:26am

If I want to join, i have to type the details individually to match the name and the purchases made?

Richard Deeming 11-May-20 15:10pm

Why have you tagged this as "C++"?

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MadMyche · Accepted Answer · 2020-05-08T04:53:00

There are no common columns between those 2 tables, so there is no way to directly join them; and that would throw an error upon execution.
If you were using an SQL IDE (eg SSMS), then intellisense would have pointed those out to you in the query text.

You also have a Sales table in there; and that does have references for both the Customer and the Painting. You could use this as a bridge table to make the connection from your Customers to your paintings.

SQL

FROM       Customer c
INNER JOIN Sales    s ON c.Customer_ID = s. Customer_ID
INNER JOIN Painting p ON s.Paint_ID    = p.Paint_ID

Going back to using an IDE dedicated for SQL to design your queries... You will notice that your SELECT list has Name highlighted. This is because it is a "Special" or "Reserved" word.
I generally will rename columns so that I don't have to deal with it, but if you do keep that column name it should be escaped when you use it within a query.

SQL

SELECT [name]