如何解析雪花中的嵌套JSON并提取特定信息？

问题描述

我对雪花非常陌生，以前曾在Teradata SQL中工作。我正在尝试从雪花表中的列中检索信息，该表的值在JSON中，如下所示：

{
  "depositsDMPResponseVO": {
    "depositsApplicationRsnsVO": {
      "applicationID": "YYYYYYY","applicationRefNbr": "XXXXXXXXX","depositsStrategyOutputVOs": [
        {
          "appDescnTms": "2020-08-18T08:07:00Z","depositsAppDecisionVO": {
            "decision": "RV","decisionType": "FRD","finalDecision": false,"reasonCodes": [
              "DO6001"
            ],"rule": false,"ruleId": "R1002","ruleName": "WebChk NewCust TotRsk","strategyName": "Web Checking Application Review","weight": 2705
          },"depositsApplicantDescnVOs": [
            {
              "applicantDecisionsRuleVOs": [
                {
                  "decision": "AP","decisionType": "CIP","reasonCodes": [],"rule": true,"ruleName": "DefaultCIP","strategyName": "DefaultCIP","weight": 100
                },{
                  "decision": "RV","reasonCodes": [
                    "DO6001"
                  ],"weight": 2705
                },{
                  "decision": "AP","finalDecision": true,"weight": 2705
                }
              ],"applicantModelScoreVOs": [
                {
                  "modelId": "CHEX","reasonCd": [
                    "AX","AP","AD","AB",null
                  ],"scoreNumber": "0576"
                }
              ],"applicantNbr": "DBAPPLCNT5920115","cipPrimVerifySrc": "LNIID","cipVerifyBy": "LexisNexis","cipVerifyMode": "NDOC","strDrvdAttr01": "isMktSrcHghRsk : 1","strDrvdAttr02": "totRskVal : 11","strDrvdAttr03": "isBnkCust : 0","strDrvdAttr04": "bnkCustTen : 0","strDrvdAttr05": "hasChkPrdct : 1","strDrvdAttr06": "isCrdCust : 0","strDrvdAttr07": "newTMXRskVal : 5","strDrvdAttr08": "TMXRskVal : 4","strDrvdAttr09": "newLNFPRskVal : 2","strDrvdAttr10": "LNFPRskVal : 1","strDrvdAttr11": "newEMAGRskVal : 4","strDrvdAttr12": "EMAGRskVal : 4","strDrvdAttr13": "tenureRskVal : 3","strDrvdAttr14": "riskyMrktSrcInd : 1","strDrvdAttr15": "jntOwnInd : 0","strDrvdAttr16": "expL3CallInd : 0","strDrvdAttr17": "lnsFPCallInd : 0","strDrvdAttr18": "hasCDorIRA : 0"
            }
          ],"strategyType": "DepositDM"
        }
      ]
    }
  }
}

我只对提取键“ strDrvdAttr02”，“ strDrvdAttr04”的值感兴趣。我以前使用flatten来获得更简单的JSON，但这对我来说太复杂了。我试图像下面这样嵌套扁平化，但是认为这行不通：

   WITH DATA2 AS 
   (
                WITH DATA1 AS  
                (
                SELECT
                APLN_ID,parse_json("DMP_OUTP_VAL") AS json
                FROM "SFAAP"."V_SOT_DIRBNK_CRSPRD_FRD_ALL"."VC_EDP_DECSN_LOG"
                WHERE "DMP_CALL_TYP_CDE"='DEPOSITDM'
                AND APLN_ID = 'XXXXXXXXX'
                )
                SELECT 
                APLN_ID,parse_json(f.value) AS mson
                FROM DATA1 d,lateral flatten(input=>d.json) f
   )
   SELECT
   APLN_ID,f.value
   FROM DATA2 d,lateral flatten(input=>d.mson) f 

我想不出任何更简单的方法来提取这2个属性，它们位于更深层的嵌套JSON中。因此，为什么要寻求专家的帮助。任何评论/帮助，不胜感激。谢谢。

解决方法

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