Parse JSON in SQL - sql

Question

I'm looking to parse a single return in JSON into multiple rows.
The string is this -
{"policy_ids":["INZP2981-11000002","INZP-00001786","0AAAA01PC06"]}
I want to just parse this so that it is a row for each policy_ids. I've tried using OpenJSON WITH however I keep returning NULL values.
DECLARE #json NVARCHAR(MAX) ;
SET #json = N'{"policy_ids":["INZP2981-11000002","INZP-00001786","0AAAA01PC06"]}' ;
SELECT
*
FROM
OPENJSON(#json)
WITH (
policy_ids varchar(200) '$.policy_ids'
)
Help is appreciated.

Answer 1

You need a different statement to parse the $.policy_ids JSON array. You may try tou use OPENJSON() with default schema (without the WITH clause). In this case the result is a table with columns key, value and type and the value column returns the value of each item in the input array.
DECLARE #json NVARCHAR(MAX) ;
SET #json = N'{"policy_ids":["INZP2981-11000002","INZP-00001786","0AAAA01PC06"]}' ;
SELECT [value] AS policy_id
FROM OPENJSON(#json, '$.policy_ids')
Result:
policy_id
-----------------
INZP2981-11000002
INZP-00001786
0AAAA01PC06
If you want to use an explicit schema, the statement is:
SELECT *
FROM OPENJSON(#json, '$.policy_ids') WITH (
policy_id varchar(200) '$'
)