可以有两种方法：unionAll 和 reduce拼接。
方法1，使用unionAll
t0 = table(1 2 3 as id, 1.1 1.2 1.3 as val)
t1 = table(4 5 6 as id, 1.1 1.2 1.3 as val)
t2 = table(7 8 9 as id, 1.1 1.2 1.3 as val)
v = (t0, t1, t2)
t = unionAll(v, false)
方法2，使用reduce模式T
v1 = table(1:0, `id`val, [INT, DOUBLE])
append! :T (v1, v)