{ "_id" : ObjectId("5f062e53687d86057d606c49"), "id" : 1, "name" : "Tome" } { "_id" : ObjectId("5f062ee7687d86057d606c4a"), "id" : 2, "name" : "Jerry", "isadmin" : "true", "gender" : null, "favorite" : [ "apple", "banana", "orange", 1, 2, 3 ], "...
"name" : "id", "ns" : "pagedb.page" }, { "key" : { "title" : 1, "url" : -1 }, "name" : "title_1url-1", "ns" : "pagedb.page" } ], "ok" : 1 } 13)统计集合记录数 use fragment switched to db fragment db.baseSe.count() 36749 ...
insertedIdstring insertedId Insert Multiple Documents Operation ID: InsertMultipleDocuments You can add more than one document at a time by using the insertMany endpoint. In that case, you must use the documents property in the body of the request to specify the array of documents you want to...
Command支持 Double 是 String 是 Object 是 Array 是 Binary Data 是 ObjectId 是 Boolean 是 Date 是 Null 是 32-bit Integer (int) 是 Timestamp 是 64-bit Integer (long) 是 MinKey 是 MaxKey 是 Decimal128 是 Regular Expression 是 JavaScript 是 JavaScript (with scope) 是 Undefined 是索引...
id public String id() Get name of the Cosmos DB MongoDB collection. Returns: the id value indexes public Listindexes() Get list of index keys. Returns: the indexes value shardKey public MapshardKey() Get a key-value pair of shard keys to be applied for the request. ...
,`col_array_to_json` STRING ,`col_array_to_join` STRING ,`key_string` STRING ,`key_int32` INT ,`key_int32_min` INT ,`key_int32_max` INT ,`key_int64` BIGINT ,`key_int64_min` BIGINT ,`key_int64_max` BIGINT ,`key_decimal` DECIMAL(38,18) ...
JavaScript constructor to instantiate a database connection frommongoshor from a JavaScript file. TheMongo()method has the following parameters: Parameter Type Description host string orMongoinstance Optional. Host or connection string. The host can either be a connection string or in the form of<ho...
|-- _id: struct (nullable = true) | |-- oid: string (nullable = true) |-- age: integer (nullable = true) |-- name: string (nullable = true) Note By default, reading from MongoDB in a SparkSession infers the schema by sampling documents from the database. To explicitly declare ...
MongoDB的Date类型需要转成String类型,格式需要和mongoDB的驱动一致,为:yyyy-MM-dd HH:mm:ss.SSS 4.数据量大,需要提升同步效率 需要支持多线程和断点续传 5.2 遇到的问题-代码修改 1._id字段被覆写,系统类型转换错误 _id默认转成了String类型,但被覆写的_id中存在Date类型,代码在查询该字段没有特殊处理,自动...
1MongoClient+connectionString : string+client : Object+connect() : Promise+close() : PromiseMyApp-dbUrl : string-dbClient : MongoClient+connectToMongoDB() : Promise 在这个类图中,MongoClient类表示MongoDB的连接客户端,MyApp类是一个实际应用程序的示例,使用MongoClient来连接和关闭数据库。