CAML query to retrieve a list of users items with ids in a list

Question

i am a beginner in sharepoint using CAML query to get a list of user items from share point list.

the data i have is userid list like below:- 1 2 3 4 5

now I want to write CAML query to retrieve the user items from share point list where the userid in (1,2,3,4,5)

Answer 1

If you want to filter data by user ID you need to set LookupId="TRUE" for Author field:

<Eq>
  <FieldRef Name="Author" LookupId="TRUE" />
  <Value Type="Integer">1</Value>
</Eq>

If you want to use multiple values for this field you should check IN Element. So your CAML should look like this:

 <In>
  <FieldRef Name="Author" LookupId="True" />
  <Values>
    <Value Type="Integer">1</Value>
    <Value Type="Integer">2</Value>
    <Value Type="Integer">3</Value>
  </Values>
</In>