SQL where clause conditions

I am stuck with a WHERE clause issue that is giving me headaches…
I want to import in Table B (NewOrder) the data from Table A (t1) but only if the data from Table A do not exist in Table C  (ArchivedOrder) but only if the field [Status] = ‘processing’
This my WHERE clause and until then it seems to be working:
WHERE NOT EXISTS (SELECT * FROM  ArchivedOrder WHERE  t1.OrdNB = ArchivedOrder.PO) AND NOT EXISTS (SELECT * FROM  NewOrder WHERE  t1.OrdNB = NewOrder.PO) AND OrdStatus LIKE 'processing'

The complication comes when I still want to import in Table B from Table A the orders where:
the field [Status] = ‘pending’ and the field [Payment] =’COD’ (both condition must be true)
I don’t know how to add this new condition
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
I guess you want this:
AND ( OrdStatus LIKE 'processing'
    OR ( OrdStatus LIKE 'pending' and Payment = 'COD' )

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PortletPaulEE Topic AdvisorCommented:
LIKE requires a wildcard to be effective, otherwise it acts as an equal

either you need to use a wildcard such as this
   OrdStatus LIKE 'processing%' -- i.e. begins with 'processing'

or you need
   OrdStatus = 'processing'

For performance use = in preference to LIKE if you can
Vitor MontalvãoMSSQL Senior EngineerCommented:
Should be something similar to:
INSERT INTO NewOrder (Col1, Col2, ..., ColN)
SELECT Col1, Col2, ..., ColN
WHERE (A.Status = 'Pending' AND A.Payment ='COD')
	OR (A.Status = 'Processing' AND 
			        FROM ArchivedOrder C
			        WHERE A.Id = C.Id))

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Scott PletcherSenior DBACommented:
I wasn't sure if the new requirement also included an OrdStatus of 'processing', so I commented it out for.  Either remove it or uncomment it depending on what you want.  Btw, it's a good idea to prefix all columns with the appropriate table alias whenever more than one table is involved in a query.

    (t1.[Status] = 'pending' AND t1.[Payment] = 'COD' /* AND t1.OrdStatus = 'processing' */ )
    (t1.OrdStatus = 'processing' AND
     NOT EXISTS (SELECT * FROM  ArchivedOrder WHERE  t1.OrdNB = ArchivedOrder.PO) AND
     NOT EXISTS (SELECT * FROM  NewOrder WHERE  t1.OrdNB = NewOrder.PO))
pascalmartinAuthor Commented:
That Exactly what I wanted
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