There is no “create” command in the MongoDB Shell. In order to create a database, you will first need to switch the context to a non-existing database using theusecommand: xxxxxxxxxx 1 1 > use myshinynewdb Note that, for now, only the context has been changed. If you enter the...
When you run a database command, you specify the command as a document to db.runCommand(). The document's key is the command to run, and the value is typically supplied as 1. The value does not affect the output of the command for example: db.runCommand( { hello: 1 } ) ...
1、创建Database 创建新数据库 use amitdb 这个时候输入show dbs,看不到我们新建的数据库amitdb,因为我们还没有在其中插入任何文档,Collections是包含大量文档的集合,这个相当于一个小数据库,它下面的文档是相当于MySQL中的table 2、创建Collections 首先打开数据库 use amitdb 之后创建一个Collections db.createCollec...
MongoDBCommandPrompt+executeCommand(command)DataCollection+insert(data)+update(data)+delete(data)+query(query) 结论 通过本文的指导,刚入行的小白应该已经学会了如何使用 MongoDB 命令行创建数据表。首先,我们连接到 MongoDB 服务器;然后,选择要创建数据表的数据库;最后,使用db.createCollection()命令创建数据表。
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. ...
1.2 use databaseName 选择库 show tables/collections 查看当前库下的collections 1.3 如何创建库 mongodb 的库是隐式创建,你可以use一个不存在的库 然后在该库下创建collection,即可创建库 1.4 db.createCollection('collectionName'); //创建collection
db.commandHelp(name) returns the help for the command db.copyDatabase(fromdb,todb,fromhost) 复制数据库fromdb---源数据库名称,todb---目标数据库名称,fromhost---源数据库服务器地址 db.createCollection(name,{size:3333,capped:333,max:88888}) 创建一个数据集,相当于一个表 ...
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: {...}}, ...], {viewOptions}) ...
2、添加管理用户(mongoDB 没有无敌用户root,只有能管理用户的用户 userAdminAnyDatabase) 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" } ]}); ...
0, // "reslen":110, // "locks": { // 在 Global: { acquireCount: { r: 13604 } }, Database: { acquireCount: { r: 6802 } }, Collection: { acquireCount: { r: 6802 } } }, "protocol": "op_command", "millis" : 69132, // 从 MongoDB 操作开始到结束耗费的时间,单位为ms ...