How To Make A Qurry Showing attachments Only

[aamer]

I have a table "Purchases" In this table field name "purattach" which stores the scanned images.

I am trying to make a querry which can show me only the transaction which has the images stored in Purchases table.



Can someone guide me how to make such a querry.

[June7]

Not sure but maybe:
SELECT * FROM Purchases WHERE purattach IS NOT NULL;