Cosmos DB Query Array value using SQL - azure

Question

I have several JSON files with below structure in my cosmos DB.
[
{
"USA": {
"Applicable": "Yes",
"Location": {
"City": [
"San Jose",
"San Diego"
]
}
}
}]
I want to query all the results/files that has the array value of city = "San Diego".
I've tried the below sql queries
SELECT DISTINCT *
FROM c["USA"]["Location"]
WHERE ["City"] IN ('San Diego')
SELECT DISTINCT *
FROM c["USA"]["Location"]
WHERE ["City"] = 'San Diego'
SELECT c
FROM c JOIN d IN c["USA"]["Location"]
WHERE d["City"] = 'San Diego'
I'm getting the results as 0 - 0

Answer 1

You need to query data from your entire document, where your USA.Location.City array contains an item. For example:
SELECT *
FROM c
WHERE ARRAY_CONTAINS (c.USA.Location.City, "San Jose")
This will give you what you're trying to achieve.
Note: You have a slight anti-pattern in your schema, using "USA" as the key, which means you can't easily query all the location names. You should replace this with something like:
{
"Country": "USA",
"CountryMetadata": {
"Applicable": "Yes",
"Location": {
"City": [
"San Jose",
"San Diego"
]
}
}
}
This lets you query all the different countries. And the query above would then need only a slight change:
SELECT *
FROM c
WHERE c.Country = "USA
AND ARRAY_CONTAINS (c.CountryMetadata.Location.City, "San Jose")
Note that the query now works for any country, and you can pass in country value as a parameter (vs needing to hardcode the country name into the query because it's an actual key name).
Tl;dr don't put values as your keys.