在Azure Cosmos DB API for MongoDB 中,索引不用于实际聚合(在本例中为 $max)。在 version 上添加索引不会改进查询性能。“已检索文档计数”等于“输出文档计数”的查询如果retrievedDocumentCount 约等于 outputDocumentCount,则查询引擎无需扫描许多不必要的文档。
SELECTCOUNT(1)FROMcWHEREc.foodGroup ="Sausages and Luncheon Meats"GROUPBYc.description 如果计划频繁运行相同的聚合查询,则与运行单个查询相比,使用Azure Cosmos DB 更改源生成实时具体化视图可能更加高效。 优化同时具有筛选器和 ORDER BY 子句的查询
我相信您正在使用Cosmos DB SDK的2.0版本。如果是这样的话，那么可以使用CreateDocumentQuery(String, ...
1.首先,我们登录Azure China Portal:https://portal.azure.cn 2.选择Azure Cosmos DB 3.创建新的资源组,命名为cosmos-rg 创建新的account name:leicosmos API设置为Core(SQL) 4.CosmosDB暂时不选择虚拟网络,图略。 注意:创建完毕后,cosmos DB并不会开始收费,因为我们没有分配RU 5.创建完毕后,我们选择该资源,...
1000으로 설정하고 100만 개 이상의 문서에 대해서는sqrt(documentCount)로 설정하는 것이 좋습니다.1의numLists값을 사용하는 것은 무차별 검색을 수행하는 것과 유사하며 성능이 제한됩니다....
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CDBDataPlaneRequests | summarize count() by AccountName Para generar un gráfico para los registros del plano de datos, agrupados por tipo de operación: Kusto Copiar CDBDataPlaneRequests | summarize count() by OperationName | render piechart En...
var db = await _client.Value.CreateDatabaseIfNotExistsAsync(new DocDatabase { Id = databaseName }); return db.StatusCode == HttpStatusCode.Created || db.StatusCode == HttpStatusCode.OK; } protected async Task<bool> CreateDocumentCollectionAsync(string collectionName, string databaseName) {...
您只能使用双嵌套匿名类从数组项中选择特定字段-请参阅下面修改后的SelectMany。这将为每个Datum返回yymm...
common scenario is to look at the evolution, over time, of documents in Cosmos DB. Each time a document is updated, it creates a record in Cosmos DB' change feed which can be ingested as a separate record in ADX. This can make ADX into an audit log / ...