CosmosDb查询嵌套数据按根字段过滤

Question

我有一个json结构，如下所示：

{
"id": "123",
"date": "2020-06-02",
"product": {
    "code": "A1",
    "name": "Product 1",
    "parents": [
        {
            "code": "P1",
            "name": "Parent 1",
            "children": [
                {
                    "code": "C1",
                    "name": "Child 1",
                }
            ]
        }
    ]
}

}

我需要返回一个扁平结构，例如。

date,       product.code, parents[].code, parents[].children[].code
----------  ------------  --------------  -------------------------
2020-06-02  A1            P1              C1

但是过滤json文档根目录中的date字段。 任何帮助表示赞赏

Answer 1

请尝试以下sql：

SELECT c.date,c.product.code,d.code AS parentCode,e.code AS childrenCode FROM c join d in c.product.parents join e in d.children

这是结果：

[
    {
        "date": "2020-06-02",
        "code": "A1",
        "parentCode": "P1",
        "childrenCode": "C1"
    }
]

希望这可以为您提供帮助。