Question

如何查询在bigquery表中存储为字符串的json？我有一个表，其中列（<SetDirectory/>）中的值如下所示：

subscriptions

如何选择{ "data": [{ "application_fee_percent": null, "canceled_at": null, "created": 1500476240, "items": { "data": [{ "created": 1500476240, "id": "s4nQMWJn4P1Lg", "metadata": {}, "object": "subscription_item", "plan": { "amount": 3, "created": 1494270926, "currency": "usd", "livemode": true, "metadata": { "currentlySelling": "true", "features": "{\"shipping\": true,\"transactionFee\":0.00}", "marketingFeatures": "[\"Unlimited products\"]" }, "name": "Personal", "object": "plan", "statement_descriptor": null, "trial_period_days": null }, "quantity": 1 }], "has_more": false, "object": "list", "total_count": 1, "url": "/v1/subscri3XwjA3" }, "livemode": true, "metadata": { "test": "596f735756976" }, "object": "suion", "quantity": 1 }], "has_more": false, "object": "list", "total_count": 1, "url": "/v1/cutions" }，application_fee_percent和features？

对于marketingFeatures，我试过了 created 但它返回null。

Answer 1

下面是BgQuery SQL（请注意答案底部的注意！）

#standardSQL
WITH yourTable AS (
  SELECT '''
    {
        "data": [{
            "application_fee_percent": null,
            "canceled_at": null,
            "created": 1500476240,
            "items": {
                "data": [{
                    "created": 1500476240,
                    "id": "s4nQMWJn4P1Lg",
                    "metadata": {},
                    "object": "subscription_item",
                    "plan": {
                        "amount": 2500,
                        "created": 1494270926,
                        "currency": "usd",
                        "id": "182463d635c6b6e43",
                        "interval": "month",
                        "interval_count": 1,
                        "livemode": true,
                        "metadata": {
                            "currentlySelling": "true",
                            "features": "{\'shipping\': true,\'transactionFee\':0.00}",
                            "marketingFeatures": "[\'Unlimited products\']"
                        },
                        "name": "Personal",
                        "object": "plan",
                        "statement_descriptor": null,
                        "trial_period_days": null
                    },
                    "quantity": 1
                }],
                "has_more": false,
                "object": "list",
                "total_count": 1,
                "url": "/v1/subscri3XwjA3"
            },
            "livemode": true,
            "metadata": {
                "test": "596f735630012756976"
            },
            "object": "subscription",
            "quantity": 1,
            "start": 1500476240,
            "status": "trialing",
            "tax_percent": 0.0,
            "trial_end": 1501685839,
            "trial_start": 1500476240
        }],
        "has_more": false,
        "object": "list",
        "total_count": 1,
        "url": "/v1/cutions"
    }
  ''' AS subscriptions
)
SELECT 
  JSON_EXTRACT_SCALAR(subscriptions, "$.data[0].application_fee_percent") AS application_fee_percent,
  JSON_EXTRACT_SCALAR(subscriptions, "$.data[0].created") AS created,
  JSON_EXTRACT_SCALAR(subscriptions, "$.data[0].items.data[0].plan.metadata.currentlySelling") AS currentlySelling,
  JSON_EXTRACT_SCALAR(subscriptions, "$.data[0].items.data[0].plan.metadata.features") AS features,
  JSON_EXTRACT_SCALAR(subscriptions, "$.data[0].items.data[0].plan.metadata.marketingFeatures") AS marketingFeatures
FROM yourTable

结果符合预期

application_fee_percent created     currentlySelling  features marketingFeatures      
null                    1500476240  true              {'shipping': true,'transactionFee':0.00}  ['Unlimited products']

请注意：您的JSON对features和marketingFeatures无效 - 它们在双引号内包含双引号 - 因此您可以看到我在示例数据中更改了此内容 - 但是您需要修复生成它的那部分应用程序

添加了原始字符串使用示例：

#standardSQL
WITH YourTable AS (
  SELECT R"""{
    "features": "{\"shipping\": true,\"productLimit\":5,\"discounts\": false,\"customDomain\": false, \"imageLimit\": 100,\"transactionFee\":0.03} "
  }""" AS subscriptions
)
SELECT
  JSON_EXTRACT_SCALAR(subscriptions, '$.features') AS features
FROM YourTable

结果是

features     
{"shipping": true,"productLimit":5,"discounts": false,"customDomain": false, "imageLimit": 100,"transactionFee":0.03}

如何在bigquery表中查询存储为字符串的json？

1 个答案: