If you haven't used U2U CAML Query Editor yet, you can get it here:U2U Caml Query EditorIt's a very easy to use application. First thing you need to is to Click "Connect".Then you will have to write your Sharepoint Portal URL:Then Click Connect. And you're free to use this tool. Click on a List Object and then Choose "New Query".What we're going to do is to get all the items in a List.The most easiest way is to get all the items whose ID are greater than and equal to 0.Write these values and then click Execute query which looks like this:Here is the result:See? We got all the records.Here I'm also giving the CAML Query: <Query> <Where> <Geq> <FieldRef Name="ID" /> <Value Type="Counter">0</Value> </Geq> </Where></Query>Hope it helps.
<Query> <Where> <Geq> <FieldRef Name="ID" /> <Value Type="Counter">0</Value> </Geq> </Where></Query>