Some of the important Join conditions between Oracle apps modules

GL AND AP    
GL_CODE_COMBINATIONS    AP_INVOICES_ALL
code_combination_id = acct_pay_code_combination_id

GL_CODE_COMBINATIONS    AP_INVOICES_DISTRIBUTIONS_ALL
code_combination_id = dist_code_combination_id

GL_SETS_OF_BOOKS AP_INVOICES_ALL
set_of_books_id = set_of_books_id

GL AND AR
GL_CODE_COMBINATIONS    RA_CUST_TRX_LINE__GL_DIST_ALL
code_combination_id = code_combination_id


GL AND INV
GL_CODE_COMBINATIONS    MTL_SYSTEM_ITEMS_B
code_combination_id = cost_of_sales_account

GL AND PO
GL_CODE_COMBINATIONS    PO_DISTRIBUTIONS_ALL
code_combination_id = code_combination_id

PO AND AP
PO_DISTRIBUTIONS_ALL      AP_INVOICE_DISTRIBUTIONS_ALL
Po_distribution_id = po_distribution_id

PO_VENDORS           AP_INVOICES_ALL
vendor_id = vendor_id

PO AND SHIPMENTS
PO_HEADERS_ALL     RCV_TRANSACTIONS
Po_header_id = po_header_id

PO_DISTRIBUTIONS_ALL      RCV_TRANSACTIONS
Po_distribution_id = po_distribution_id

SHIPMENTS AND AP INVOICE
RCV_TRANSACTIONS           AP_INVOICE_DISTRIBUTIONS_ALL
RCV_TRANSACTION_ID = RCV_TRANSACTION_ID

PO AND  INV
PO_REQUISITION_LINES_ALL MTL_SYSTEM_ITEMS_B
item_id = inventory_item_id
org_id = organization_id

PO AND HRMS
PO_HEADERS_ALL     HR_EMPLOYEES
Agent_id = employee_id

PO AND REQUISITION
PO_DISTRIBUTIONS_ALL      PO_REQ_DISTRIBUTIONS_ALL
req_distribution_id = distribution_id

SHIPMENTS AND INV
RCV_TRANSACTIONS           MTL_SYSTEM_ITEMS_B
Organization_id         =        organization_id

INV AND HRMS
MTL_SYSTEM_ITEMS_B       HR_EMPLOYEES
buyer_id        =        employee_id

OM  AND  AR
OE_ORDER_HEADERS_ALL              RA_CUSTOMER_TRX_LINES_ALL
TO_CHAR( Order_number)    =        interface_line_attribute1

OE_ORDER_LINES_ALL                   RA_CUSTOMER_TRX_LINES_ALL
TO_CHAR(Line_id)     =        interface_line_attribute6  

OE_ORDER_LINES_ALL                   RA_CUSTOMER_TRX_LINES_ALL
reference_customer_trx_line_id       =        customer_trx_line_id

OM AND SHIPPING
OE_ORDER_HEADERS_ALL               WSH_DELIVARY_DETAILS
HEADER_ID     =        SOURCE_HEADER_ID

OE_ORDER_HEADERS_ALL              WSH_DELIVARY_DETAILS
LINE_ID         =        SOURCE_LINE_ID

AP AND AR (BANKS)
AR_CASH_RECEIPTS_ALL               AP_BANK_ACCOUNTS
REMITTANCE_BANK_ACCOUNT_ID    =        ABA.BANK_ACCOUNT_ID

AP AND AR
HZ_PARTIES                      AP_INVOICES_ALL
PARTY_ID      =        PARTY_ID

OM AND CRM
OE_ORDER_LINES_ALL         CSI_ITEM_INSTANCES(Install Base)
LINE_ID         =        LAST_OE_ORDER_LINE_ID