पहले हम एक घोषित तालिका चर बनाते हैं और इसे कुछ नमूना JSONs से भरते हैं ताकि समस्या का अनुकरण किया जा सके (मैंने सरणियों के लिए JSON पथ को प्रतिबिंबित करने के लिए नमूनों में कुछ सरणियाँ जोड़ीं):
DECLARE @table TABLE(ID INT IDENTITY, AnyJSON NVARCHAR(MAX));
INSERT INTO @table VALUES
(N' {
"correlationId": "c3xOeEEQQCCA9sEx7-u6FA",
"eventCreateTime": "2020-05-12T15:38:23.717Z",
"time": 1589297903717,
"owner": {
"ownergeography": {
"city": "abc",
"country": "abc"
},
"ownername": {
"firstname": "abc",
"lastname": "def"
},
"clientApiKey": "xxxxx",
"businessProfileApiKey": null,
"userId": null
},
"campaignType": "Mobile push"
}')
,(N'[{
"correlationIds": [
{
"campaignId": [1,2,3],
"correlationId": [{"a":"b"},{"c":"d"},{"e":"f"}]
}
],
"variantId": 1278915,
"utmCampaign": "",
"ua.os.major": "8"
}
,{
"correlationIds": [
{
"campaignId": [1,2,3],
"correlationId": [{"a":"b"},{"c":"d"},{"e":"f"}]
}
],
"variantId": 1278915,
"utmCampaign": "",
"ua.os.major": "8"
}]')
,(N'{
"correlationId": "ls7XmuuiThWzktUeewqgWg",
"eventCreateTime": "2020-05-12T12:40:20.786Z",
"time": 1589287220786,
"modifiedBy": {
"clientId": null,
"clientApiKey": "xxx",
"businessProfileApiKey": null,
"userId": null
},
"campaignType": "Mobile push"
}');
--क्वेरी
WITH recCTE AS
(
SELECT ID
,NestLevel = 0
,ObjectIndex = CAST(1 AS bigint)
,SortString = CAST(N'sort' COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
,JsonPath = CAST(N'$' COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
,JsonKey = CAST(N'$' COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
,JsonValue = CAST(AnyJSON COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
,JsonType = CAST(CASE WHEN LEFT(TRIM(AnyJSON),1)=N'[' THEN 4 ELSE 0 END AS TINYINT)
,NestedJSON = CAST(CASE WHEN ISJSON(AnyJSON)=1
THEN AnyJSON
ELSE NULL END COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
FROM @table t
UNION ALL
SELECT r.ID
,r.NestLevel+1
,ROW_NUMBER() OVER(ORDER BY (SELECT NULL))
,CAST(CONCAT(r.SortString,REPLACE(STR(ROW_NUMBER() OVER(ORDER BY (SELECT NULL)),5),' ','0')) COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
,CAST(CONCAT(r.JsonPath, CASE WHEN r.JsonType=4 --<-- see the docs for OPENJSON()
THEN CONCAT('[',A.[key],']')
ELSE '.' + A.[key] END) COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
,CAST(A.[key] COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
,CAST(r.JsonValue COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
,A.[type]
,CAST(A.[value] COLLATE DATABASE_DEFAULT AS NVARCHAR(MAX))
FROM recCTE r
CROSS APPLY OPENJSON(r.NestedJSON) A
WHERE ISJSON(r.NestedJSON)=1
)
SELECT ID
,NestLevel
,ObjectIndex
,JsonPath
,JsonKey
,NestedJSON AS JsonValue
,SortString --<-- just to illustrate the sorting, not needed in the output
FROM recCTE
WHERE ISJSON(NestedJSON)=0
ORDER BY ID,SortString;
परिणाम
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| ID | JsonPath | JsonKey | JsonValue | SortString |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.correlationId | correlationId | c3xOeEEQQCCA9sEx7-u6FA | 0 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.eventCreateTime | eventCreateTime | 2020-05-12T15:38:23.717Z | 0 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.time | time | 1589297903717 | 0 3 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.owner.ownergeography.city | city | abc | 0 4 1 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.owner.ownergeography.country | country | abc | 0 4 1 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.owner.ownername.firstname | firstname | abc | 0 4 2 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.owner.ownername.lastname | lastname | def | 0 4 2 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.owner.clientApiKey | clientApiKey | xxxxx | 0 4 3 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 1 | $.campaignType | campaignType | Mobile push | 0 5 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].correlationIds[0].campaignId[0] | 0 | 1 | 0 1 1 1 1 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].correlationIds[0].campaignId[1] | 1 | 2 | 0 1 1 1 1 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].correlationIds[0].campaignId[2] | 2 | 3 | 0 1 1 1 1 3 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].correlationIds[0].correlationId[0].a | a | b | 0 1 1 1 2 1 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].correlationIds[0].correlationId[1].c | c | d | 0 1 1 1 2 2 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].correlationIds[0].correlationId[2].e | e | f | 0 1 1 1 2 3 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].variantId | variantId | 1278915 | 0 1 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].utmCampaign | utmCampaign | | 0 1 3 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[0].ua.os.major | ua.os.major | 8 | 0 1 4 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].correlationIds[0].campaignId[0] | 0 | 1 | 0 2 1 1 1 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].correlationIds[0].campaignId[1] | 1 | 2 | 0 2 1 1 1 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].correlationIds[0].campaignId[2] | 2 | 3 | 0 2 1 1 1 3 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].correlationIds[0].correlationId[0].a | a | b | 0 2 1 1 2 1 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].correlationIds[0].correlationId[1].c | c | d | 0 2 1 1 2 2 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].correlationIds[0].correlationId[2].e | e | f | 0 2 1 1 2 3 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].variantId | variantId | 1278915 | 0 2 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].utmCampaign | utmCampaign | | 0 2 3 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 2 | $[1].ua.os.major | ua.os.major | 8 | 0 2 4 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 3 | $.correlationId | correlationId | ls7XmuuiThWzktUeewqgWg | 0 1 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 3 | $.eventCreateTime | eventCreateTime | 2020-05-12T12:40:20.786Z | 0 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 3 | $.time | time | 1589287220786 | 0 3 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 3 | $.modifiedBy.clientApiKey | clientApiKey | xxx | 0 4 2 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
| 3 | $.campaignType | campaignType | Mobile push | 0 5 |
+----+-------------------------------------------+-----------------+--------------------------+---------------------------------+
संक्षेप में विचार:
- हम इसे कम करने के लिए एक पुनरावर्ती CTE का उपयोग करते हैं।
- क्वेरी किसी भी टुकड़े का परीक्षण करेगी (
[value]OPENJSON. से आ रहा है ) वैध JSON होने के लिए। - यदि खंड मान्य है, तो यह और गहरा और गहरा चलता है।
- कॉलम
SortStringअंतिम सॉर्ट ऑर्डर प्राप्त करने के लिए आवश्यक है। - द
CAST()औरCOLLATEडेटा प्रकार बेमेल से बचने में मदद करता है। रिकर्सिव सीटीई इसके साथ बहुत उपयुक्त हैं...
संकेत:यदि आप बड़े JSON से निपटते हैं तो आपको OPTION (MAXRECURSION 0) सेट करने की आवश्यकता हो सकती है आपकी क्वेरी के अंत में।
आनंद लें :-)
XML के लिए कुछ ऐसा ही
यहां अज्ञात XML को पढ़ने के तरीके के बारे में एक समान उत्तर है।
