在DolphinDB database中，有如下2表，连接后显示如下：
t1= table(1 2 3 as id, 7.8 4.6 5.1 as value) t2 = table(1 3 5 as id, 300 500 800 as qty) fj(t1,t2, `id) id value t2_id qty 1 7.8 1 300 2 4.6 3 5.1 3 500 5 800
若我想得到下列效果，该怎么做？
id value qty 1 7.8 300 2 4.6 3 5.1 500 5 800
select t1.id.nullFill(t2.id) as id, value, qty from fj(t1,t2, `id)
