SNOWFLAKE - 将整个 table 转换为 JSON？

Question

将整个 table 转换为 JSON?

我有以下 table [table1]:

我想将所有这些转换成新的 table 和 JSON 格式的单列，可以吗？

期望的结果新 table [table2] :

[table] |新列JSON|

{
  "[1]": {
    "Column B ": " hello 1 ",
    "Column C ": " world1",
  },
  "[2]": {
    "Column B ": " hello 2 ",
    "Column C ": " world2",
  },
  "[3]": {
    "Column B ": " hello 3 ",
    "Column C ": " world3",
  },
}

感谢您的帮助。

Answer 1

有了这个伟大的 CTE 作为我们的 Table:

WITH fake_data(columnA, columnB, columnC) as (
    select * from values
    (1, 'hello1', 'world1'),
    (2, 'hello2', 'world2'),
    (3, 'hello3', 'world3')
)

我们可以使用这个 SQL:

SELECT columnA, object_construct('column b', columnb, 'column c', columnc) as obj
FROM fake_data;

然后我们可以使用 OBJECT_CONSTRUCT 给我们 sub-objects:

COLUMNA	OBJ
1	{ "column b": "hello1", "column c": "world1" }
2	{ "column b": "hello2", "column c": "world2" }
3	{ "column b": "hello3", "column c": "world3" }

我们可以将其包裹在OBJECT_AGG

中

SELECT object_agg(columnA, object_construct('column b', columnb, 'column c', columnc)) as obj
FROM fake_data;

OBJ
{ "1": { "column b": "hello1", "column c": "world1" }, "2": { "column b": "hello2", "column c": "world2" }, "3": { "column b": "hello3", "column c": "world3" } }

SNOWFLAKE - 将整个 table 转换为 JSON？

SNOWFLAKE-Convert an entire table to JSON?

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