Getting a specific item in a sub array and selecting one value from it - azure-cosmosdb

Question

I want to get the boardgame rank (value) from this nested array in Cosmos DB.
{
"name": "Alpha",
"statistics": {
"numberOfUserRatingVotes": 4155,
"averageRating": 7.26201,
"baysianAverageRating": 6.71377,
"ratingStandardDeviation": 1.18993,
"ratingMedian": 0,
"rankings": [
{
"id": 1,
"name": "boardgame",
"friendlyName": "Board Game Rank",
"type": "subtype",
"value": 746
},
{
"id": 4664,
"name": "wargames",
"friendlyName": "War Game Rank",
"type": "family",
"value": 140
},
{
"id": 5497,
"name": "strategygames",
"friendlyName": "Strategy Game Rank",
"type": "family",
"value": 434
}
],
"numberOfComments": 1067,
"weight": 2.3386,
"numberOfWeightVotes": 127
},
}
So I want:
{
"name": "Alpha",
"rank": 746
}
Using this query:
SELECT g.name, r
FROM Games g
JOIN r IN g.statistics.rankings
WHERE r.name = 'boardgame'
I get this (so close!):
{
"name": "Alpha",
"r": {
"id": 1,
"name": "boardgame",
"friendlyName": "Board Game Rank",
"type": "subtype",
"value": 746
}
},
But extending the query to this:
SELECT g.name, r.value as rank
FROM Games g
JOIN r IN g.statistics.rankings
WHERE r.name = 'boardgame'
I get this error:
Failed to query item for container Games:
Message: {"errors":[{"severity":"Error","location":{"start":21,"end":26},"code":"SC1001","message":"Syntax error, incorrect syntax near 'value'."}]}
ActivityId: 0a0cb394-2fc3-4a67-b54c-4d02085b6878, Microsoft.Azure.Documents.Common/2.14.0
I don't understand why this doesn't work? I don't understand what the syntax error is. I tried adding square braces but that didn't help. Can some help me understand why I get this error and also how to achieve the output I'm looking for?

Answer 1

This should work,
SELECT g.name, r["value"] as rank
FROM Games g
JOIN r IN g.statistics.rankings
WHERE r.name = 'boardgame'