[{“ legs”：[{“ points”：[{“ latitude”：29.76524，“ longitude”：-95.35406}，{“ latitude”：30.74438，“ longitude”：-101.71203}，{“ latitude” ：30.74421，“经度”：-101.71247}，{“纬度”：30.74404，“经度”：-101.71289}，{“纬度”：30.74366，“经度”：-101.71374}，{“纬度”：30.74346，“经度“：-101.71415}，{”纬度“：30.74303，”经度“：-101.71495}，{”纬度“：30.74274，”经度“：-101.71543}，{”纬度“：30.74234，”经度“：-101.71606} ，{“纬度”：31.82985，“经度”：-102.34753}，{“纬度”：31.8302，“经度”：-102.34597}，{“纬度”：31.83029，“经度”：-102.34557}，{“纬度” ：31.83038，“经度”：-102.34526}，{“纬度”：31.83051，“经度”：-102.3448}，{“纬度”：31.83081，“经度”：-102.344}，{“纬度”：31.83099，“经度“：-102.34356}，{”纬度“：31.83113，”经度“：-102.34328}，{”纬度“：31.83145，”经度“：-102.34271}，{”纬度“：31.83174，”经度“：-102.34226} ，{“ la titude“：31.83207，” longitude“：-102.34181}，{” latitude“：31.83267，” longitude“：-102.34109}，{” latitude“：31.83317，” longitude“：-102.34053}，{” latitude“：31.83359， “ longitude”：-102.34007}，{“ latitude”：31.8339，“ longitude”：-102.33971}，{“ latitude”：31.83499，“ longitude”：-102.33852}，{“ latitude”：31.83547，“ longitude”：- 102.338}，{“纬度”：31.83553，“经度”：-102.33793}，{“纬度”：31.83685，“经度”：-102.33648}，{“纬度”：31.83764，“经度”：-102.3356}，{“纬度”：31.83838，“经度”：-102.33479}，{“纬度”：31.84575，“经度”：-102.32666}，{“纬度”：31.84603，“经度”：-102.32636}，{“纬度”：31.84679， “ longitude”：-102.32551}，{“ latitude”：31.84878，“ longitude”：-102.32333}，{“ latitude”：31.85095，“ longitude”：-102.32094}，{“ latitude”：31.85131，“ longitude”：- 102.32054}，{“纬度”：31.85134，“经度”：-102.32044}，{“纬度”：31.85259，“经度”：-102.31886}，{“纬度”：31.85273，“经度”：-10 2.31859}，{“纬度”：31.85462，“经度”：-102.3165}，{“纬度”：31.85467，“经度”：-102.31644}，{“纬度”：31.85489，“经度”：-102.3162}，{“纬度”：31.85505，“经度”：-102.3164}，{“纬度”：31.8552，“经度”：-102.3166}，{“纬度”：31.85533，“经度”：-102.31677}，{“纬度”：31.85506， “ longitude”：-102.31706}，{“ latitude”：31.85655，“ longitude”：-102.32234}，{“ latitude”：31.85851，“ longitude”：-102.32294}]，“ summary”：{“ arrivalTime”：“ 2020 -06-04T01：22：22-05：00“，” departureTime“：” 2020-06-03T17：28：11-05：00“，” lengthInMeters“：863989，” trafficDelayInSeconds“：528，” travelTimeInSeconds“： 28451}}]，“ sections”：[{“ endPointIndex”：5797，“ sectionType”：“ TRAVEL_MODE”，“ startPointIndex”：0，“ travelMode”：“ car”}]，“ summary”：{“ arrivalTime”： “ 2020-06-04T01：22：22-05：00”，“ departureTime”：“ 2020-06-03T17：28：11-05：00”，“ lengthInMeters”：863989，“ trafficDelayInSeconds”：528，“ travelTimeInSeconds “：28451}}]
答案 0 :(得分：1)
我会咨询文档，尤其是https://docs.snowflake.com/en/sql-reference/functions/flatten.html和https://docs.snowflake.com/en/user-guide/semistructured-concepts.html
这将取决于您如何加载数据，但这是一个示例查询，可帮助您入门：
with tbl as (select parse_json($1)::variant list_json from values ('[ { "legs": [ { "points": [ { "latitude": 29.76524, "longitude": -95.35406 }, { "latitude": 30.74438, "longitude": -101.71203 }, { "latitude": 30.74421, "longitude": -101.71247 }, { "latitude": 30.74404, "longitude": -101.71289 }, { "latitude": 30.74366, "longitude": -101.71374 }, { "latitude": 30.74346, "longitude": -101.71415 }, { "latitude": 30.74303, "longitude": -101.71495 }, { "latitude": 30.74274, "longitude": -101.71543 }, { "latitude": 30.74234, "longitude": -101.71606 }, { "latitude": 31.82985, "longitude": -102.34753 }, { "latitude": 31.8302, "longitude": -102.34597 }, { "latitude": 31.83029, "longitude": -102.34557 }, { "latitude": 31.83038, "longitude": -102.34526 }, { "latitude": 31.83051, "longitude": -102.3448 }, { "latitude": 31.83081, "longitude": -102.344 }, { "latitude": 31.83099, "longitude": -102.34356 }, { "latitude": 31.83113, "longitude": -102.34328 }, { "latitude": 31.83145, "longitude": -102.34271 }, { "latitude": 31.83174, "longitude": -102.34226 }, { "latitude": 31.83207, "longitude": -102.34181 }, { "latitude": 31.83267, "longitude": -102.34109 }, { "latitude": 31.83317, "longitude": -102.34053 }, { "latitude": 31.83359, "longitude": -102.34007 }, { "latitude": 31.8339, "longitude": -102.33971 }, { "latitude": 31.83499, "longitude": -102.33852 }, { "latitude": 31.83547, "longitude": -102.338 }, { "latitude": 31.83553, "longitude": -102.33793 }, { "latitude": 31.83685, "longitude": -102.33648 }, { "latitude": 31.83764, "longitude": -102.3356 }, { "latitude": 31.83838, "longitude": -102.33479 }, { "latitude": 31.84575, "longitude": -102.32666 }, { "latitude": 31.84603, "longitude": -102.32636 }, { "latitude": 31.84679, "longitude": -102.32551 }, { "latitude": 31.84878, "longitude": -102.32333 }, { "latitude": 31.85095, "longitude": -102.32094 }, { "latitude": 31.85131, "longitude": -102.32054 }, { "latitude": 31.85134, "longitude": -102.32044 }, { "latitude": 31.85259, "longitude": -102.31886 }, { "latitude": 31.85273, "longitude": -102.31859 }, { "latitude": 31.85462, "longitude": -102.3165 }, { "latitude": 31.85467, "longitude": -102.31644 }, { "latitude": 31.85489, "longitude": -102.3162 }, { "latitude": 31.85505, "longitude": -102.3164 }, { "latitude": 31.8552, "longitude": -102.3166 }, { "latitude": 31.85533, "longitude": -102.31677 }, { "latitude": 31.85506, "longitude": -102.31706 }, { "latitude": 31.85655, "longitude": -102.32234 }, { "latitude": 31.85851, "longitude": -102.32294 } ], "summary": { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } } ], "sections": [ { "endPointIndex": 5797, "sectionType": "TRAVEL_MODE", "startPointIndex": 0, "travelMode": "car" } ], "summary": { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } } ]') t)
,flat_tbl as (select unnested.value json from tbl, lateral flatten(list_json) unnested)
select
legs.value:summary.trafficDelayInSeconds trafficDelayInSeconds,
legs.value:summary summary,
points.value point
from flat_tbl,
lateral flatten(json:legs) legs,
lateral flatten(legs.value:points) points
;
它会产生这样的结果，这只是您在解析方面可能要做的猜测。
TRAFFICDELAYINSECONDS SUMMARY POINT
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 29.76524, "longitude": -95.35406 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 30.74438, "longitude": -101.71203 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 30.74421, "longitude": -101.71247 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 30.74404, "longitude": -101.71289 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 30.74366, "longitude": -101.71374 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 30.74346, "longitude": -101.71415 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 30.74303, "longitude": -101.71495 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 30.74274, "longitude": -101.71543 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 30.74234, "longitude": -101.71606 }
528 { "arrivalTime": "2020-06-04T01:22:22-05:00", "departureTime": "2020-06-03T17:28:11-05:00", "lengthInMeters": 863989, "trafficDelayInSeconds": 528, "travelTimeInSeconds": 28451 } { "latitude": 31.82985, "longitude": -102.34753 }