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Pindaro is now working on a comprehensive book on SQL Server 2014.  For any comments you can email the author at alphapress@hotmail.com.

  

 

 

Create a one to many relationship using pure SQL

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This article is from the book "Access 2007 Pure SQL

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Discussion:

In this scenario, we create a one-to-many relationship between the tblCustomer1 and tblOrders1tables using CustomerID as the joining field. Notice we use the ADD CONSTRAINT statement to create the actual relationship.  

Code:

ALTER TABLE tblOrders1

ADD CONSTRAINT C_OrdersRelationship

FOREIGN KEY (CustomerID)

REFERENCES tblCustomer1 (CustomerID);
 

Result:

Go to "Database Tools" and click on "Relationships" in the "Show/Hide" group.  Right click on the pane and make the two tables show in the relationships pane.  The two tables will appear with a one-to-many relationship established already.  In addition, you will notice that referential integrity is already set as well.  This is really cool, isn't it?