Need help on building CAML Query

I have this table

    Col1  | Col2  | Col3
 1  MeYou | You   | Them
 2  Them  | They  | You
 3  Them  | Me    | They
 4  They  | Us    | We
 5  Us    | Them  | MeAsk

I would like to do these Query

Select all rows from MyTable 
Where Col1 contains 'Me' or Col2 contains 'Me' or Col3 contains 'Me'

Select all rows from MyTable 
Where (Col1 contains 'Me' or Col3 contains 'Me') and Col2 equals to 'Them'

Based on the table shown and using the cond开发者_如何学Cition that I wanted on my query, Query 1 should get 3 rows in return. The returned rows must be row1, row3 and row5. Query 2 should get only 1 row in return and that is row5.

My question is how am I going to compose this kind of query in CAML query for my sharepoint apps?

Thanks in advance :)

First Query

<Where>
  <Or>
     <Contains>
        <FieldRef Name='Col1' />
        <Value Type='User'>22</Value>
     </Contains>
     <Or>
        <Contains>
           <FieldRef Name='Col2' />
           <Value Type='User'>22</Value>
        </Contains>
        <Contains>
           <FieldRef Name='Col3' />
           <Value Type='User'>22</Value>
        </Contains>
     </Or>
  </Or>
</Where>

second Query

<Where>
    <Or>
        <Contains>
            <FieldRef Name="Col1" /> 
            <Value Type="User">22</Value>
        </Contains>
        <And>
            <Contains>
                <FieldRef Name="Col2" /> 
                <Value Type="User">23</Value>
            </Contains>
            <Contains>
                <FieldRef Name="Col3" /> 
                <Value Type="User">22</Value>
            </Contains>
        </And>
    </Or>
</Where>