JSON query with Snowflake - sql

Question

Hello I have the below json field (addressbooklist) in which im trying to extract addr1 however my code results are NULL
Can someone help?
Query-
select
addressbooklist:addressbook.addressbookAddress.addr1 as test,
from customer;
JSON Field
{
"addressbook": [
{
"addressbookAddress": {
"addr1": "701 N. Brand Boulevard",
"addr2": null,
"addr3": null,
"addrPhone": null,
"addrText": "Executive Software International<br>701 N. Brand Boulevard<br>Glendale CA 912031242<br>United States",
"addressee": "Executive Software International",
"attention": null,
"city": "Glendale",
"country": {
"value": "_unitedStates"
},
"customFieldList": null,
"internalId": null,
"nullFieldList": null,
"override": false,
"state": "CA",
"zip": "912031242"
},
"defaultBilling": false,
"defaultShipping": true,
"internalId": "1587207",
"isResidential": false,
"label": "701 N. Brand Boulevard"
},
{
"addressbookAddress": {
"addr1": "701 N. Brand Boulevard",
"addr2": null,
"addr3": null,
"addrPhone": null,
"addrText": "Executive Software International<br>701 N. Brand Boulevard<br>Glendale CA 912031242<br>United States",
"addressee": "Executive Software International",
"attention": null,
"city": "Glendale",
"country": {
"value": "_unitedStates"
},
"customFieldList": null,
"internalId": null,
"nullFieldList": null,
"override": false,
"state": "CA",
"zip": "912031242"
},
"defaultBilling": true,
"defaultShipping": false,
"internalId": "1587208",
"isResidential": false,
"label": "701 N. Brand Boulevard"
}
],
"replaceAll": false
}

Answer 1

Your json document addressbook element is an array, not a plain property. You can reference a specific element in an array with [0] notation (0=first element, 1=second,...). Your query would look like this:
select addressbooklist:addressbook[0].addressbookAddress.addr1 as test from customer;
If you want to have all of the addressbook items in the result, you can flatten the json structure with this kind of query:
select ab.value:addressbookAddress.addr1 as test
from customer
, lateral flatten(input => addressbooklist:addressbook) ab;
Result:
TEST
"701 N. Brand Boulevard"
"701 N. Brand Boulevard"
More info on Snowflake json syntax for arrays can be found here:
Get single array items: https://docs.snowflake.com/en/user-guide/querying-semistructured.html#retrieving-a-single-instance-of-a-repeating-element
Flatten function to get table from array:
https://docs.snowflake.com/en/user-guide/querying-semistructured.html#using-the-flatten-function-to-parse-arrays

Answer 2

The JSON object you refered to has the following structure:
Array[Object1{key1: value, key2: value}, Object2{key1: value, key2: value}]
Object1 is the first item of your array with the index 0, Object2 has index 1 and so on.
You access an item of an array like Array[0] and you can reach a value inside an object like Object1.key1. In this example you would reach out to key1 like Array[0]Object1.key1.
In your case you can access addr1 in you first object like this:
addressbook[0].addressbookAddress.addr1

Answer 3

It would help to know which language you want to use. I just have to do this with mySQL. Something like this may help:
select
yourField->>'$."addressbookAddress"[0].addr1' as address
from yourTable
where 1