Is there a way to parameterize the second argument of openjson - sql

Question

My json data looks like:
SET #json='{
"_id": "4erutit8979044kd5",
"ADDRESSES": {
"1": {
"VALIDATED": "",
"TYPE": "billing",
"RESIDENTIAL": "",
"REGION": "ON",
"POSTAL": "L6789W",
"PO": 0,
"PHONE": "222222",
"NAME_2": "Kapil",
"NAME_1": "Kaushal",
"LINE_2": "",
"LINE_1": "215 Wards Ct.",
"EMAIL": "kapilk#gmail.com",
"COUNTRY": "IN",
"CITY": "Jodhpur",
"LAST_USED": 1435590000.0
},
"2": {
"TYPE": "billing",
"RESIDENTIAL": "",
"REGION": "JD",
"POSTAL": "2222",
"PO": 0,
"PHONE": "",
"NAME_2": "Salman",
"NAME_1": "Kursheed",
"LINE_2": "",
"LINE_1": "1459 Thomas Street",
"EMAIL": "salmank#gmail.com",
"COUNTRY": "IN",
"CITY": "Jodhpur",
"LAST_USED": 1436460000.0,
"VALIDATED": "dirty"
},
"3": {
"VALIDATED": "clean",
"TYPE": "shipping",
"CITY": "Jaisalmer",
"COUNTRY": "IN",
"EMAIL": "rajk#gmail.com",
"LINE_1": "1020 Carripa Enclave",
"LINE_2": "",
"NAME_1": "Raj",
"NAME_2": "Kumar",
"PO": 0,
"POSTAL": "222234",
"REGION": "JS",
"LAST_VALIDATED": "2015-07-14T16:20:42.242Z",
"LAST_USED": 1436460000.0
}
}, ...
and so on
I want to achieve something like:
WHILE #cnt < 3
BEGIN
--insert into dummy_table
select *
from openjson (#json,'$.ADDRESSES."#cnt"')
SET #cnt = #cnt + 1;
END;
The line is working fine as:
select * from openjson (#json,'$.ADDRESSES."1"')
select * from openjson (#json,'$.ADDRESSES."1"')
But not with a variable #cnt, even if i define #cnt as char = '1'.
Please help me achieve the same. The no of addresses may differ, so i want to make it dynamic.

Answer 1

The exact answer is Yes, but it depends on the SQL Server version. You have the follolwing options:
For SQL Server 2017+, you can provide a variable as the value of path. Note that, when the key name starts with a dollar sign or contains special characters such as spaces or numbers, you need to surround it with quotes.
DECLARE #cnt int
SET #cnt = 1
--INSERT INTO dummy_table
SELECT *
FROM OPENJSON(#json, CONCAT('$.ADDRESSES."', #cnt, '"'))
For SQL Server 2016+ you need to parse the input JSON with OPENJSON() and a default schema. The result is a table with columns key, value and type.
DECLARE #cnt int
SET #cnt = 1
--INSERT INTO dummy_table
SELECT j2.*
FROM OPENJSON(#json, '$.ADDRESSES') j1
CROSS APPLY OPENJSON(j1.[value]) j2
WHERE j1.[key] = #cnt
Result:
key value type
VALIDATED 1
TYPE billing 1
RESIDENTIAL 1
REGION ON 1
POSTAL L6789W 1
PO 0 2
PHONE [phone]
NAME_2 Kapil 1
NAME_1 Kaushal 1
LINE_2 1
LINE_1 215 Wards Ct. 1
EMAIL kapilk#gmail.com 1
COUNTRY IN 1
CITY Jodhpur 1
LAST_USED 1435590000.0 2
As an additional option, you don't need a WHILE loop to get specific values from the input JSON. The following statement parses the values from $.ADDRESSES.1, $.ADDRESSES.2 and $.ADDRESSES.3 keys.
--INSERT INTO dummy_table
SELECT j2.*
FROM (VALUES (1), (2), (3)) v(cnt)
JOIN OPENJSON(#json, '$.ADDRESSES') j1 ON CONVERT(int, j1.[key]) = v.cnt
CROSS APPLY OPENJSON(j1.[value]) j2

Answer 2

Try this:
DECLARE #json NVARCHAR(MAX);
SET #json='{
"_id": "4erutit8979044kd5",
"ADDRESSES": {
"1": {
"VALIDATED": "",
"TYPE": "billing",
"RESIDENTIAL": "",
"REGION": "ON",
"POSTAL": "L6789W",
"PO": 0,
"PHONE": "222222",
"NAME_2": "Kapil",
"NAME_1": "Kaushal",
"LINE_2": "",
"LINE_1": "215 Wards Ct.",
"EMAIL": "kapilk#gmail.com",
"COUNTRY": "IN",
"CITY": "Jodhpur",
"LAST_USED": 1435590000.0
},
"2": {
"TYPE": "billing",
"RESIDENTIAL": "",
"REGION": "JD",
"POSTAL": "2222",
"PO": 0,
"PHONE": "",
"NAME_2": "Salman",
"NAME_1": "Kursheed",
"LINE_2": "",
"LINE_1": "1459 Thomas Street",
"EMAIL": "salmank#gmail.com",
"COUNTRY": "IN",
"CITY": "Jodhpur",
"LAST_USED": 1436460000.0,
"VALIDATED": "dirty"
},
"3": {
"VALIDATED": "clean",
"TYPE": "shipping",
"CITY": "Jaisalmer",
"COUNTRY": "IN",
"EMAIL": "rajk#gmail.com",
"LINE_1": "1020 Carripa Enclave",
"LINE_2": "",
"NAME_1": "Raj",
"NAME_2": "Kumar",
"PO": 0,
"POSTAL": "222234",
"REGION": "JS",
"LAST_VALIDATED": "2015-07-14T16:20:42.242Z",
"LAST_USED": 1436460000.0
}
}'
DECLARE #cnt INT = 1;
DECLARE #query NVARCHAR(128);
WHILE #cnt <= 3
BEGIN
--insert into dummy_table
SET #query = '$.ADDRESSES."' + CAST(#cnt AS VARCHAR(4)) + '"'
select *
from openjson (#json,#query)
SET #cnt = #cnt + 1;
END;
Just build the second parameter as a string and pass it.