Order By using CAML queries

Use the below code type to achieve order by using CAML queries in your SSRS query designer

<RSSharePointList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <ListName>Regions</ListName>

  <ViewFields>

   <FieldRef Name="RegionName"/>

  </ViewFields>

<Query>

<OrderBy>

    <FieldRef Name="RegionName" Ascending = "True"/>

</OrderBy>

</Query>

</RSSharePointList>