sql query to check AP invoice and payments

  SELECT aca.check_number "Document Number",
         asa.segment1 "Supplier Number",
         asa.vendor_name "Supplier Name",
         aca.STATUS_LOOKUP_CODE "Payment Reconcilation Status",
         aca.CLEARED_AMOUNT "Payment Amount",
         aca.CURRENCY_CODE "Currency",
         aca.CLEARED_DATE "Payment Date",
         aia.invoice_num,
         aia.invoice_amount,
         AP_INVOICES_PKG.GET_APPROVAL_STATUS (aia.INVOICE_ID,
                                              aia.INVOICE_AMOUNT,
                                              aia.PAYMENT_STATUS_FLAG,
                                              aia.INVOICE_TYPE_LOOKUP_CODE)
            "Invoice Acct Status"
    FROM ap_checks_all aca,
         ap_invoice_payments_all aipa,
         ap_invoices_all aia,
         ap_suppliers asa
   WHERE     aca.check_id = aipa.check_id
         AND aipa.invoice_id = aia.invoice_id
         AND aia.vendor_id = asa.vendor_id
         AND aipa.ACCRUAL_POSTED_FLAG = 'N'
         AND POSTED_FLAG = 'N'
         AND TRUNC (aca.CLEARED_DATE) BETWEEN '01-JUN-2013' AND '30-JUN-2013'
ORDER BY check_number;