To create a database using a command-line interface, the first task is to get access to the MongoDB cluster you are using via the MongoDB Shell. A shell is a program that allows you to enter commands into a sof
MongoDBdidn’t provides any command to create “database“. Actually, you don’t need to create it manually, because, MangoDB will create it on the fly, during the first time you save the value into the defined collection (or table in SQL), and database. For developer from SQL backgr...
使用db.createCollection() 显式创建Collection,通过指定Collection Option,创建特定用途的Collection。 Because MongoDB creates a collection implicitly when the collection is first referenced in a command, this method is used primarily for creating new collections that use specific options. 例如,创建固定集合(...
利用mongo命令连接mongoDB服务器端: > use admin switched to db admin > db.createUser( {user: "pfnieadmin",pwd: "123456",roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]}); 成功后,你将会看到: 注:添加完用户后可以使用show users或db.system.users.find()查看已有用户. 3、添加...
To run a command against the current database, use db.runCommand(): db.runCommand( { <command> } ) To run an administrative command against the admin database, use db.adminCommand(): db.adminCommand( { <command> } ) Note For details on a specific command, including syntax and example...
db.cloneDatabase(fromhost) - deprecated db.commandHelp(name) returns the help for the command db.copyDatabase(fromdb, todb, fromhost) - deprecated db.createCollection(name, {size: ..., capped: ..., max: ...}) db.createView(name, viewOn, [{$operator: {...}}, ...], {viewOptio...
switched to db redhat 1. 2. ②新建表 rs0:PRIMARY> db.createCollection("class") { "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1643023713, 1), "signature" : { "hash" : BinData(0,"7SNRK8H9v7OkxWIPp1zPMMMpgMc="), ...
在数据库智能管家 DBbrain的实时会话页面的活跃会话页签,查看是否有多个正在添加索引的进程。如下图所示,可以在Command列查询到 CreateIndex 关键字段。 使用建议 避免在高峰期同时创建多个大型索引,可以将索引的创建时间分散开来。 尽量使用后台方式创建索引,以避免占用过多的内存。具体创建索引的方式,请...
// Command #1 1:1 0.019 s admin 0.000GB config 0.000GB local 0.000GB The second command switched the execution context to the 'test' database: // Command #2 2:1 0.018 s switched to db test But didn't create any database as we can see from the third command result: ...
「建立資料庫」延伸模組命令建立新的 MongoDB 資料庫。 可使用的資料庫名稱來自use database命令設定的資料庫內容。 下表描述命令內的參數: 欄位類型描述 customActionstring自訂命令的名稱。 值必須是CreateDatabase。 offerThroughputint您在資料庫上設定的佈建輸送量。 這是選擇性參數。