MSSQL select JSON file with multirows and insert into table - json

Question

I read the docs of handling a JSON file here. So far I am able to read the file and get a result:
QRY: SELECT * FROM OPENROWSET (BULK 'c:\ne.db', SINGLE_CLOB) as import
Result: {"res":{"number":"123", "info":"c-PM6900"},"_id":"aHMIeu6ZwB9lIBZk"} {"res":{"number":"456", "info":"a-PMs900"},"_id":"aHaIeu6ZwB9sIBZ1"}....
if I qry this, I only get the first row with the res nested:
Declare #JSON varchar(max)
SELECT #JSON=BulkColumn
FROM OPENROWSET (BULK 'C:\ne.db', SINGLE_CLOB) import
SELECT *
FROM OPENJSON (#JSON)
What I want to achieve, is to read every entry of the JSON file and insert "res" from the json query into a row of a table in the database containing columns "number","info","id". If anyone could help me to finish this, I would appreciate.
The JSON file contains about 400000 lines and comes from a NodeJS script which uses nedb.
Here is the example file: LINK

Answer 1

The JSON in the file is not a valid JSON, it contains multiple root elements or a single row for each JSON object. It's strange, but OPENJSON() reads only the first element in this JSON input without generating an error.
But you may try to transform the input JSON into a valid JSON array ({...} {...} into [{}, {...}]) and parse this JSON array with OPENJSON() and explicit schema. If the input file has a single row for each JSON object, you need to know the new line separator (it's usually CHAR(10)):
DECLARE #json nvarchar(MAX)
-- Read the file's content
-- SELECT #json = BulkColumn
-- FROM OPENROWSET (BULK 'C:\ne.db', SINGLE_CLOB) AS [Insert]
-- Only for test
SELECT #json =
N'{"res":{"number":"123", "info":"c-PM6900"},"_id":"aHMIeu6ZwB9lIBZk"}' +
CHAR(10) +
N'{"res":{"number":"456", "info":"a-PMs900"},"_id":"aHaIeu6ZwB9sIBZ1"}'
SELECT [number], [info], [_id]
FROM OPENJSON(CONCAT('[', REPLACE(#json, CONCAT('}', CHAR(10), '{'), '},{'), ']')) WITH (
[number] varchar(3) '$.res.number',
[info] varchar(10) '$.res.info',
_id varchar(50) '$._id'
)
Result:
number info _id
123 c-PM6900 aHMIeu6ZwB9lIBZk
456 a-PMs900 aHaIeu6ZwB9sIBZ1

Answer 2

You need to use a couple of calls to OPENJSON to achieve this, with a WITH:
DECLARE #JSON nvarchar(MAX) = N'{"res":{"number":"123", "info":"c-PM6900"},"_id":"aHMIeu6ZwB9lIBZk"} {"res":{"number":"456", "info":"a-PMs900"},"_id":"aHaIeu6ZwB9sIBZ1"}'
SELECT J._id,
r.number,
r.info
FROM OPENJSON(#JSON)
WITH (_id varchar(30),
res nvarchar(MAX) AS JSON) J
CROSS APPLY OPENJSON(J.res)
WITH(number int,
info varchar(10)) r;
Because the OP appears to think I am telling them to change their DECLARE and assignment statement... to confirm how you get the value into the #JSON, from the OP's own question:
DECLARE #JSON varchar(max);
SELECT #JSON=BulkColumn
FROM OPENROWSET (BULK 'C:\ne.db', SINGLE_CLOB);
Final edit, is also appears that the OP's JSON is malformed, as I would expect a comma, or something, before the second res definition. Guessing we need to split it into rows as well, which means some string splitting:
SELECT J._id,
r.number,
r.info
FROM STRING_SPLIT(REPLACE(#JSON,N'}} {"res"',N'}}|{"res"'),'|') SS --I assume a pipe (|`) won't appear in the data
CROSS APPLY OPENJSON(SS.[value])
WITH (_id varchar(30),
res nvarchar(MAX) AS JSON) J
CROSS APPLY OPENJSON(J.res)
WITH(number int,
info varchar(10)) r;
db<>fiddle