[英]How to SQL query a nested list and array in a MS Azure CosmosDB?
我有以下 ( Azure ) CosmosDB (子)結構,它有 2 個嵌套的 arrays:
{
"id": "documentTypes",
"SomeThing": "SomeThing",
"configuration": [
{
"language": "en",
"list": [
{
"id": 1,
"name": "Supporting Documents"
},
{
"id": 2,
"name": "Summary PDF"
},
]
}
],
}
我嘗試了以下查詢,但結果很差。
SELECT * FROM c WHERE c.documentTypes.configuration[0].list[0].id FROM c
和
SELECT
p.id,
p.name
FROM f
JOIN c IN f.configuration
JOIN p IN c.list
WHERE c.id == 'documentTypes'
Q
:我怎樣才能只得到name
和id
的列表?
你需要這個?
SELECT ARRAY(SELECT VALUE e FROM c JOIN d IN c["configuration"] JOIN e IN d["list"]) AS Result FROM c
Output:
[ { "Result": [ { "id": 1, "name": "Supporting Documents" }, { "id": 2, "name": "Summary PDF" } ] } ]
我自己的解決方案類似於Sajeetharan的:
SELECT list.id, list.name FROM c
JOIN configuration IN c.configuration
JOIN list IN configuration.list
WHERE c.id = 'documentTypes'
這對我來說看起來更簡單一些,因為不需要[""]
和ARRAY()
function,而且不會產生額外的Result
項。 我不知道是否有任何性能差異。
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