CloudKit - How to perform Not Exists query? -

i want perform database query in cloudkit in sql:

select * table1 t1 not exists      (select *     table2 t2     t1.userid = t2.userid) 

do know how that?

try select * table1 t1 t1.userid not in( select t2.userid table2 t2);

or

select t1.userid table1 t1 minus select t2.userid table2 t2;