StringData getDatabase() const { 23. if (auto elem = body["$db"]) 24. return elem.checkAndGetStringData(); 25. uasserted(40571, "OP_MSG requests require a $db argument"); 26. } 27. //find insert 等命令信息 body中的第一个elem就是command 名 28. StringData getCommandName() cons...
db.auth(username, password) 访问认证 db.cloneDatabase(fromhost) 克隆数据库 db.commandHelp(name) returns the help for the command db.copyDatabase(fromdb, todb, fromhost) 复制数据库 db.createCollection(name, { size : ..., capped : ..., max : ... } ) 创建表 db.currentOp() displays...
db.runCommand(cmdObj) run a database command. if cmdObj is a string, turns it into { cmdObj : 1 } db.serverStatus() db.setProfilingLevel(level,<slowms>) 0=off 1=slow 2=all db.shutdownServer() db.stats() db.version() current version of the server db.getMongo().setSlaveOk() ...
mongod --help# 输出的信息如下:...Storage options: --storageEngine arg What storage engine to use - defaults to wiredTigerifno data files present --dbpath arg Directoryfordatafiles - defaults to /data/db --directoryperdb Each database will be storedina separate directory... MongoDB除了可以...
连接: killall mongo mongo --host 127.0.0.1:27017 创建超级管理员 >use admin >db.createUser({ user:"wjb", pwd:"wjb123456", roles:[ { role:"userAdminAnyDatabase", db:"admin" } ] }) Successfully added user: { "user" : "user", "roles" : [ { "role" : "dbOwner", "db" : "...
MongoDB的所有请求都以命令的形式发出,支持的命令列表参考Database Commands The mongo Shell: https://docs.mongodb.com/manual/mongo/ db是mongoDB的全局变量,持有当前数据库schema的引用。 首次进入客户端shell,敲入命令db ...
Command Syntax When you run a database command, you specify the command as a document todb.runCommand(). The document's key is the command to run, and the value is typically supplied as1. The value does not affect the output of the command for example: ...
use<db_name>setcurrent database db.foo.find()list objectsincollection foo db.foo.find({a:})list objectsinfoo where a==it resultofthe last line evaluated;use to further iterate DBQuery.shellBatchSize=xsetdefaultnumberofitems to display on shell ...
db.dropDatabase() //首先要通过use切换到当前的数据库 2. Mongodb增删改查(CURD) id 系统会自动加一个 时间戳+机器码 生成 1. 增(insert) 新增一条db.userinfo.insert({name:"贾宝玉",age:25,gander:"男",address:'贾府'})新增多条db.userinfo.insert([{name:,address:},{name:"林黛玉",age:...
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 ...