如何在具有嵌套数据的大查询中查找重复项

Question

我有如下表结构，需要在 Google 大查询中查找重复记录

|- Main category
|- Field 1
|- Field 2
|- Field 3

+- sub category
    |- Field 1
    |- Field 2
    |- Field 3
    +- sub sub category
        |- Field 1
        |- Field 2
        |- Field 3

Answer 1

你的意思是这样的？ 本质上，从数组中创建一个 json 字符串，将它们分组并排除 counts=1。

with test as (

    select * from unnest([
        struct(1 as id, [1,2,3] as subc),
        (2, [3,4,5]),
        (3, [1,2,3])
    ])
)

select 
    to_json_string(subc) as dupl
from test
group by 1
having count(dupl)>1