Information générale
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
Multiple JOINs SQL/ Local View
I have created 6 tables: Order , Customer, ShipTo, BillTo, and ShipVia and Transport Tables in a database.
I need information in all these files pertaining to a specific order to be displayed on the Order form. Can I get all this information by creating a Local View with on SQL statement and multiple INNER JOINS? I read there is a limit to 4 tables when using an INNER JOIN. Is there a way around this?
Following is the general structure:
===================================
Order.DBF
---------
ID
PONo
CustomerID
Customer.DBF
------------
ID
cCode
cName
ShipTo.DBF
------------
ID
cCustomerID
cCode
cName
BillTo.DBF
------------
ID
cCustomerID
cCode
cName
ShipVia.DBF
------------
ID
cCustomerID
cCode
cTransportID
Transport.DBF
------------
ID
cCode
cName
ShipTo, BillTo, and ShipVia records belong to the Customers related on ID & CumstomerID. (One to Many)
ShipVia belongs to Customers AND requires a selection from the Transport.dbf (list of all transports)
When creating an order, a customer is selected, then the billto, then the shipto, then the shipvia.
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