how to check data in table without exists condition?

hi friends 

 

 i need to check data in table without IF EXISTS method

 

if exists (select * from table1 where [columname] in ('data1','data2') /// here data1 is already                                                                                                      in table DATA2 is not in table 

 

begin

    -----select query

end

   else

begin

        ------ insert

end

 

help mee friends 

 

how to find out thees