Lookingat this more you will probably only want unique customers so it some opne places multiple orders you may want to throw a distinct in there
SELECT DISTINCT a.CustID FROM Customers a,Orders b WHERE a.CustID = b.CustID -----Original Message----- From: Eric Creese Sent: Tuesday, November 30, 2004 11:05 AM To: CF-Talk Subject: RE: SQL Query question. Please help... Sometimes using NOT can have performance issues You can also do: SELECT a.CustID FROM Customers a,Orders b WHERE a.CustID = b.CustID -----Original Message----- From: Adam Haskell [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 30, 2004 11:06 AM To: CF-Talk Subject: Re: SQL Query question. Please help... Multiple ways heres one: SELECT CustID FROM Customers WHERE CustID NOT IN (Select CustID From Orders) Adam On Tue, 30 Nov 2004 12:01:30 -0500, Che Vilnonis <[EMAIL PROTECTED]> wrote: > Say I have two simple queries: > > <cfquery name="getCustsFromCusts" datasource="#DSN#"> > SELECT CustID > FROM Customers > </cfquery> > > [and that query returns 700 records.] > > <cfquery name="getCustsFromOrders" datasource="#DSN#"> > SELECT CustID > FROM Orders > </cfquery> > > [and that query returns 500 records.] > > The first query gets all Customer IDs. The second query gets all Csutomer > IDs that have placed orders. Is there some way in SQL, to combine these two > queries into one and return only the Customer IDs that are in the > 'Customers' table that ARE NOT in the 'Orders' table. Using this example, > 200 records would be returned. > > Any help would be appreciated. > Che > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Special thanks to the CF Community Suite Gold Sponsor - CFHosting.net http://www.cfhosting.net Message: http://www.houseoffusion.com/lists.cfm/link=i:4:185687 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
