how to write subquery and use “In” Clause in Hive

Question

How can I use In clause in Hive I want to write something like this in Hive select x from y where y.z in (select distinct z from y) order by x; But I am not finding any way o

Answer 1

assume table t1(id,name) and table t2(id,name)

listing only those ids from t1 that exists in t2(basically IN clause)

hive>select a.id from t1 a left semi join t2 b on (a.id=b.id);

listing only those ids from t1 that exists only in t1 but not in t2(basically NOT IN clause)

hive>select a.id from t1 a left outer join t2 b on(a.id=b.id) where b.id is null;