Vendor ID, Last Update Date, Invoice Details - Query

Question

For each Supplier, we would like to know the vendor ID, vendor number, vendor name, vendor site code, Created Date, Last Update Date, last invoice date, last payment date, total number of invoices and total $ amount of invoices for each supplier.
1) How do i find the last payment date and supplier catagory?
2) As i have to use sum(invoice_amount), count(invoice_amount), max(payment_date) which point to 3 different tables, i am not sure how to use "group by" based on the Vendor_id alone while i select lot of fields from different table. Could you please help me with this?
3) Please help me to get this query fixed.

Answer 1

1) You can get last_payment_date by joining vendor_id to ap_invoices_all and the joining invoice_id with ap_invoice_payments_all to get the max accounting_date (i.e. last payment date)
2) You are partially right. Invoice_amount and invoice_count are from the same table so you have to join 2 tables. Best way is to do a select in the select.
e.g SELECT   pv.vendor_name, COUNT (1), SUM (invoice_amount), pv.vendor_id,
         (SELECT MAX (aipa.accounting_date)
            FROM ap_invoice_payments_all aipa, ap_invoices_all aia2
           WHERE aia2.vendor_id = pv.vendor_id
             AND aia2.invoice_id = aipa.invoice_id) latest_payment
    FROM ap_invoices_all aia, po_vendors pv
   WHERE aia.vendor_id = pv.vendor_id
GROUP BY pv.vendor_name, pv.vendor_idSandeep Gandhi