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MongoDB学习笔记~客户端命令行的使用

当我们从MongoDB.aspx' >MongoDB网站下载安装包之后,它会伴随有一系列的工具,服务器程序mongod是我们耳熟能详的了,客户端mongo和性能检测mongostat我们可能就没有用过了,今天主要是介绍一下mongo这个客户端命令行工具的使用。

测试环境:服务端:linux版的mongod 2.6.9

              客户端:window版的mongo 2.6.9

下面介绍一些常用的命令

1 建立一个新的链接

var x=new Mongo("192.168.2.4:27017")

2 显示所有数据库

show dbs

MongoDB学习笔记~客户端命令行的使用

3 指定当前要使用的数据库

var db=x.getDB("background")

4 得到当前数据库的名称

db.getName()

MongoDB学习笔记~客户端命令行的使用

5 得到数据库的所有集合

db.getCollectionNames()

MongoDB学习笔记~客户端命令行的使用

6 得到数据库中集合的详细信息

db.getCollectionInfos()

MongoDB学习笔记~客户端命令行的使用

7 得到指定的集合

db.getCollection("background")

MongoDB学习笔记~客户端命令行的使用

8 得到集合中元素的数量

db.getCollection("background").count()

MongoDB学习笔记~客户端命令行的使用

9 得到服务器相关信息

db.hostInfo()

MongoDB学习笔记~客户端命令行的使用

10 得到当前Mongo服务器的连接信息

db.getMongo()

MongoDB学习笔记~客户端命令行的使用

MongoDB学习笔记~客户端命令行的使用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" />

12 删除索引

db.TableName.dropIndex({"LoginName":1})

各位对索引一定要引起重视,因为在大数据情况下,如果没有索引,在进行排序,查询等操作时就引发全表扫描,那代价是非常大的!




原标题:MongoDB学习笔记~客户端命令行的使用

关键词:MongoDB

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