Guys your help was greatly appreciated last time and I was wondering if I could call on the collective wisdom of the group again 

I have been playing with SQL again but I am stuck.
First off I made this up and it worked
Code: Select all
SELECT 
	SFDC_Transactions.Operation, 
	SUM
		(datediff
			(minute,
				(SFDC_Transactions.Start_Time+SFDC_Transactions.Start_Date),
				(SFDC_Transactions.End_Time+SFDC_Transactions.End_Date)
			)
		)
FROM 
"Emax-Live".dbo.SFDC_Transactions SFDC_Transactions
WHERE 
	(SFDC_Transactions.Work_Order='NP') AND 
	(SFDC_Transactions.Live=0) AND 
	(SFDC_Transactions.End_Date>=getdate()-7)
GROUP BY 
	SFDC_Transactions.Operation
(Dates and times are held seperatly and I need to join  them together)
It produces a table like so
code - time (in mins)
10     -      500
20     -      500
30     -      500
40     -      500
I then wanted to relate the codes to something meaningfull and I had to jump through hoops (jump across some tables) to find this.
Code: Select all
SELECT 
	SFDC_Transactions.Operation, 
	WO_Op_List.'Op Description',
SUM
	(
	datediff
		(
			minute,
			(SFDC_Transactions.Start_Time+SFDC_Transactions.Start_Date),
			(SFDC_Transactions.End_Time+SFDC_Transactions.End_Date)
		)
	)
FROM 
	"Emax-Live".dbo.SFDC_Transactions SFDC_Transactions,
	"Emax-Live".dbo.WO_Op_List WO_Op_List, 
	"Emax-Live".dbo.WO_Operations WO_Operations, 
	"Emax-Live".dbo.WORK_ORDERS WORK_ORDERS
WHERE 
	SFDC_Transactions_List.Operation = WO_Operations.Op_No AND
	WO_Operations.WO_ID = WORK_ORDERS.WORK_ORDERS_ID AND 
	WO_Op_List.WORK_ORDERS_ID = WORK_ORDERS.WORK_ORDERS_ID AND 
	(
		(SFDC_Transactions_List."Work Order"='np') AND
		(WORK_ORDERS.WO_No='136012') AND
		(SFDC_Transactions_List."End Date">=getdate()-7)
	)
GROUP BY SFDC_Transactions.Operation
When I try to run It I initially get a syntax error before I get
The multi-part identifier "SFDC_transactions_list.operation" could not be bound.
The multi-part identifier "SFDC_transactions_list.Work Order" could not be bound.
The multi-part identifier "SFDC_transactions_list.End Date" could not be bound.
I expect it to be something stupid like a missing comma but I can't get it to work. 
Any help would be greatly appreciated.