--
-- ### Union all selects 
-- 
--

drop if exists table t1;
create table t1 ( a int, b string(10));
insert into t1 values ( 1, 'XXX');

drop if exists table t2;
create table t2 ( a int, b string(10));
insert into t2 values ( 2, 'YYYY');


select a,b from t1 union all select a,b from t2;
