SELECT DISTINCT table3.ID, table3.Company FROM table3 INNER JOIN table2 ON table3.ID = table2.t2_ID INNER JOIN table1 ON table2.ordernumber = table1.ordernumber WHERE (table1.productcode LIKE '%a certain string%')
On Thu, May 26, 2011 at 11:41 AM, Mark Atkinson <ma...@aocs.org> wrote: > > Hallo all, > > Forgive my SQL "injection" into this list - perhaps an answer to my > question might also prove useful to others. > > I'm using three tables. There is no relationship between table1 and table3. > > I first query table1 for ordernumber and productcode, based on the > productcode containing a certain string. > > Outputting the results, I query table2 for ordernumber and t2_ID based on > table2.ordernumber matching table1.ordernumber. > > Looping those results, I query table3 for ID and Company based on > table2.t2_ID. > > This, rather painfully I do admit, finds the table3.Company(ies) that > has(have) purchased table1.productcode. > > Have Googled and read about how a single select with JOIN and/or UNION > would achieve these results, but they also mention how I should essentially > "start at the end" and work my way backwards, so to speak. Can't quite get > my head around this. > > TIA for any advice. > Mark > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:344917 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm