PO base tables in oracle apps R12

PO_HEADERS_ALL :

This is the Purchase Order Headers Table in Oracle Apps. Here below you will find po_headers_all table columns details.
We can find the po number in po_headers_all in Segment1 Column of PO_HEADERS_ALL table.
This table have information's like PO Number, PO Type , Vendor Id ,Vendor Site Id, Currency ,PO Status.

PO_LINES_ALL :

Here's Below we can find po_lines_all table description
 
This is the PO Lines Tables in Oracle Apps. In This Table We have Item Id , Qty , Item Description ,UOM , UNIT_PRICE and many other important Columns.

PO_DISTRIBUTIONS_ALL :

This Contains PO distributions Data. It handles the GL Account for the Line and Ship to locations too.

PO_LINE_LOCATIONS_ALL :

This is the PO Lines Tables in Oracle Apps. In This Table We have Item Id , Qty , Item Description ,UOM , UNIT_PRICE and many other important Columns. This table also provide information about total received qty against PO line and Total Invoiced Quantity too.