从 BigQuery 返回聚合 JSON？

Question

如果我在 BigQuery 中有以下内容example_table。当我使用“原始查询”查询表时，我得到“实际结果”（从那时起）。有没有办法直接查询 BigQuery 以获得“所需结果”

原始查询

SELECT ID, SUBID FROM `example_table ORDER BY ID

示例_表

ID | SUBID
12   abc
12   def
12   ghi
34   jkl
34   mno
56   prg

实际结果

[{
    "ID": "12",
    "SUBID": "abc"
}, {
    "ID": "12",
    "SUBID": "def"
}, {
    "ID": "12",
    "SUBID": "ghi"
}, {
    "ID": "34",
    "SUBID": "jkl"
}, {
    "ID": "34",
    "SUBID": "mno"
}, {
        "ID": "56",
        "SUBID": "prg"
    }]

期望的结果

[{
    "ID": "12",
    "SUBID": ["abc", "def", "ghi"]
}, {
    "ID": "34",
    "SUBID": ["jkl", "mno"]
}, {
        "ID": "56",
        "SUBID": ["prg"]
    }]

Answer 1

以下是 BigQuery 标准 SQL

#standardSQL
SELECT ID, ARRAY_AGG(SUBID) SUBID
FROM `project.dataset.example_table`
GROUP BY ID

您可以使用问题中的示例数据来测试、玩上面的内容，如下例所示

#standardSQL
WITH `project.dataset.example_table` AS (
  SELECT 12 ID, 'abc' SUBID UNION ALL
  SELECT 12, 'def' UNION ALL
  SELECT 12, 'ghi' UNION ALL
  SELECT 34, 'jkl' UNION ALL
  SELECT 34, 'mno' UNION ALL
  SELECT 56, 'prg' 
)
SELECT ID, ARRAY_AGG(SUBID) SUBID
FROM `project.dataset.example_table`
GROUP BY ID
-- ORDER BY ID

有结果