MongoDB最基本命令速查筆記

更新時間：2016年01月05日 16:44:12 作者：1angxi

這篇文章主要介紹了一些MongoDB最基本命令的這樣一個速查筆記,包括MongoDB非正常關(guān)閉后無法啟動問題的解決方法,需要的朋友可以參考下

安裝后在控制臺輸入:

mongo啟動客戶端。

show dbs顯示所有數(shù)據(jù)庫。

use xxx選中數(shù)據(jù)庫為當前使用的數(shù)據(jù)庫。

show collections顯示當前數(shù)據(jù)庫的所有集合。

db.colleciton.find()來查找表格的所有數(shù)據(jù)。

db.serverStatus()查看數(shù)據(jù)庫服務(wù)器的狀態(tài)。

db.stats()查詢指定數(shù)據(jù)庫的統(tǒng)計信息。

use xxx如果數(shù)據(jù)庫不存在則創(chuàng)建數(shù)據(jù)庫（必須在雖然插入一條數(shù)據(jù)）

db.storeCollection.insert({'version':'13', 'segment':'456'})插入數(shù)據(jù)，同時創(chuàng)建集合

db.dropDatabase()刪除數(shù)據(jù)庫

db.mycoll.drop()刪除集合

db.storeCollection.save({'version':'3.5', 'segment':'e3ol6'})更新記錄

db.storeCollection.remove({'version':'3.5'}) 刪除記錄

db.page.ensureIndex({'title':1, 'url':-1})創(chuàng)建索引，1正序，-1逆序

db.page.getIndexes()查詢建立的索引

db.mycoll.dropIndex(name) 刪除索引，如果不帶參數(shù)，刪除所有索引

db.baseSe.reIndex()重建索引

db.baseSe.storageSize()查詢指定數(shù)據(jù)庫的集合的可用的存儲空間

db.baseSe.totalSize()查詢集合已分配的存儲空間

PS：非正常關(guān)閉后無法啟動問題
段時間不小心非正常關(guān)閉了mongoDB，準備重啟卻發(fā)現(xiàn)不行，錯誤信息如下：

Tue Apr 17 11:13:30
Tue Apr 17 11:13:30 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.
Tue Apr 17 11:13:30
Tue Apr 17 11:13:30 [initandlisten] MongoDB starting : pid=7128 port=27017 dbpath=D:\Programs\mongodb204\db 32-bit host=FALCON
Tue Apr 17 11:13:30 [initandlisten]
Tue Apr 17 11:13:30 [initandlisten] ** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of data
Tue Apr 17 11:13:30 [initandlisten] **    see http://blog.mongodb.org/post/137788967/32-bit-limitations
Tue Apr 17 11:13:30 [initandlisten] **    with --journal, the limit is lower
Tue Apr 17 11:13:30 [initandlisten]
Tue Apr 17 11:13:30 [initandlisten] db version v2.0.4, pdfile version 4.5
Tue Apr 17 11:13:30 [initandlisten] git version: 329f3c47fe8136c03392c8f0e548506cb21f8ebf
Tue Apr 17 11:13:30 [initandlisten] build info: windows sys.getwindowsversion(major=6, minor=0, build=6002, platform=2, service_pack='Service Pack 2')BOOST_LIB_VERSION=1_42
Tue Apr 17 11:13:30 [initandlisten] options: { dbpath: "D:\Programs\mongodb204\db" }
**************
Unclean shutdown detected.
Please visit http://dochub.mongodb.org/core/repair for recovery instructions.
*************
Tue Apr 17 11:13:30 [initandlisten] exception in initAndListen: 12596 old lock file, terminating
Tue Apr 17 11:13:30 dbexit:
Tue Apr 17 11:13:30 [initandlisten] shutdown: going to close listening sockets...
Tue Apr 17 11:13:30 [initandlisten] shutdown: going to flush diaglog...
Tue Apr 17 11:13:30 [initandlisten] shutdown: going to close sockets...
Tue Apr 17 11:13:30 [initandlisten] shutdown: waiting for fs preallocator...
Tue Apr 17 11:13:30 [initandlisten] shutdown: closing all files...
Tue Apr 17 11:13:30 [initandlisten] closeAllFiles() finished
Tue Apr 17 11:13:30 dbexit: really exiting now

解決方法：
1、刪除%MONGO_HOME%/db下的.lock文件

2、輸入命令 mongod --repair

3、重啟mongoDB

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