从嵌套数组中提取多列数据

Question

I am using SQL Server 2016 and want to extract data from array.

But I got stuck.

DECLARE @idvalue NVARCHAR(MAX)='[{"testId":"b29b2327-527c-456d-8346-6bd22d198f21","testValue":"FAILURE","test":"b29b2327-527c-456d-8346-6bd22d198f21:FAILURE","testStartTimestamp":"2020-06-25T09:22:17.299Z"}
,{"testId":"4674bc9c-9551-496b-b488-8e138a4dc459","testValue":"FAILURE","test":"4674bc9c-9551-496b-b488-8e138a4dc459:FAILURE","testStartTimestamp":"2020-06-25T09:22:17.299Z"},{"testId":"38c20ac5-dbb7-43ad-b139-f8fde13d0ea5","testValue":"FAILURE","test":"38c20ac5-dbb7-43ad-b139-f8fde13d0ea5:FAILURE","testStartTimestamp":"2020-06-25T09:22:17.3Z"},{"testId":"4a3b3102-d3fa-4c2c-b3cf-46e6822fae5c","testValue":"FAILURE","test":"4a3b3102-d3fa-4c2c-b3cf-46e6822fae5c:FAILURE","testStartTimestamp":"2020-06-25T09:22:17.3Z"},{"testId":"f80bec6d-ab5c-4f63-8aea-cd2f5179195e","testValue":"FAILURE","test":"f80bec6d-ab5c-4f63-8aea-cd2f5179195e:FAILURE","testStartTimestamp":"2020-06-25T09:22:17.3Z"},{"testId":"e75896d2-f314-4423-87be-ea70b2ba5adb","testValue":"FAILURE","test":"e75896d2-f314-4423-87be-ea70b2ba5adb:FAILURE","testStartTimestamp":"2020-06-25T09:22:17.301Z"}]';

select P_conversations_conversationId,
       P_conversations_participants_sessions_flow_outcomes,
       JSON_VALUE(REPLACE(P_conversations_participants_sessions_flow_outcomes,'[',''),'$.testId') as testId,
       JSON_VALUE(REPLACE(REPLACE(P_conversations_participants_sessions_flow_outcomes,'[',''),']',''),'$.testEndTimestamp') as testEndTimestamp,
       JSON_VALUE(REPLACE(@idvalue,'[',''),'$.testValue') AS [testValue],
       JSON_VALUE(REPLACE(@idvalue,'[',''),'$.testStartTimestamp') as testStartTimestamp,
       JSON_VALUE(REPLACE(@idvalue,'[',''),'$.test') as test 
FROM Dashboardtable;

In the declare statement I have given sample data.

Answer 1

Yoy may try to parse the input JSON with OPENJSON() and explicit schema:

 SELECT *
 FROM OPENJSON(@idvalue) WITH (
    testId varchar(36) '$.testId',
    testValue varchar(100) '$.testValue',
    test varchar(100) '$.test',
    testStartTimestamp datetime2(3) '$.testStartTimestamp'
 )

Result:

testId                                  testValue   test                                             testStartTimestamp
b29b2327-527c-456d-8346-6bd22d198f21    FAILURE     b29b2327-527c-456d-8346-6bd22d198f21:FAILURE    2020-06-25 09:22:17.299
4674bc9c-9551-496b-b488-8e138a4dc459    FAILURE     4674bc9c-9551-496b-b488-8e138a4dc459:FAILURE    2020-06-25 09:22:17.299
38c20ac5-dbb7-43ad-b139-f8fde13d0ea5    FAILURE     38c20ac5-dbb7-43ad-b139-f8fde13d0ea5:FAILURE    2020-06-25 09:22:17.300
4a3b3102-d3fa-4c2c-b3cf-46e6822fae5c    FAILURE     4a3b3102-d3fa-4c2c-b3cf-46e6822fae5c:FAILURE    2020-06-25 09:22:17.300
f80bec6d-ab5c-4f63-8aea-cd2f5179195e    FAILURE     f80bec6d-ab5c-4f63-8aea-cd2f5179195e:FAILURE    2020-06-25 09:22:17.300
e75896d2-f314-4423-87be-ea70b2ba5adb    FAILURE     e75896d2-f314-4423-87be-ea70b2ba5adb:FAILURE    2020-06-25 09:22:17.301

If the JSON content is stored in a table, you need an additional APPLY operator:

SELECT j.*
-- FROM Dashboardtable d
FROM (VALUES (@idvalue)) d (P_conversations_participants_sessions_flow_outcomes)
OUTER APPLY OPENJSON(d.P_conversations_participants_sessions_flow_outcomes) WITH (
   testId varchar(36) '$.testId',
   testValue varchar(100) '$.testValue',
   test varchar(100) '$.test',
   testStartTimestamp datetime2(3) '$.testStartTimestamp'
) j

As an additional option, if you want to extract scalar values from JSON array, you need to use an index in the path definition:

SELECT
   JSON_VALUE(@idvalue, '$[0].testValue') AS testValue,
   JSON_VALUE(@idvalue, '$[0].testStartTimestamp') AS testStartTimestamp,
   JSON_VALUE(@idvalue, '$[0].test') AS test 

Answer 2

Assuming you just want the data out of the variable, then you can use OPENJSON . If not, then you need to tell us what you're actually after.

SELECT *
FROM OPENJSON(@idvalue)
     WITH(testId uniqueidentifier,
          testValue varchar(10),
          test uniqueidentifier,
          testStartTimestamp datetimeoffset(1));