create table t(
  a int,
  b int without system versioning
) with system versioning;

insert into t values(1, 2);
insert into t values(3, 4);
select * from t;
select a from t for system_time as of timestamp now(6);
select a, b, b+0 from t for system_time as of timestamp now(6);
select * from t for system_time as of timestamp now(6);
select count(*) from t group by b query for system_time as of timestamp now(6);
select * from t for system_time as of timestamp now(6) order by b asc;
select * from t for system_time as of timestamp now(6) order by b desc;
select * from t group by a having a=2 query for system_time as of timestamp now(6);
select * from t group by b having b=2 query for system_time as of timestamp now(6);
select a from t where b=2 query for system_time as of timestamp now(6);
select a from t where b=NULL query for system_time as of timestamp now(6);
select count(*), b from t group by b having b=NULL query for system_time as of timestamp now(6);
select a, b from t;

drop table t;