Joins concept in AX

Regarding the joins concept the below link will describe  all the types which includes pictures.


http://msdaxtech.blogspot.in/2015/03/joins-and-link-types-in-ax-2012.html


OR


https://community.dynamics.com/ax/b/axhari/archive/2014/09/24/form-data-source-link-types-active-delay-passive-inner-join-outer-join-exist-join-not-exist-join.aspx

What are the classes, Tables, Forms and Methods used to post the sales orders in AX

SalesTableType and SaleslineType classes will get called while creating the orders.

SalesFormLetter* classes will be used to post the sales order at various document

status(packing, invoice etc).

SalesParm* tables are used to prepare the data for posting 

CustConfirmJour, CustConfirmTrans - when a sales order gets confirmed

CustPackingSlipJour, CustPackingSlipTrans - when a packing slip is posted.

CustInvoiceTable,CustInvoiceTrans - when an invoice is posted.

These are some of the mainly used tables.