MongoDB最基本命令速查筆記_MongoDB

安裝後在控制台輸入:

mongo啟動用戶端。

show dbs顯示所有資料庫。

use xxx選中資料庫為當前使用的資料庫。

show collections顯示當前資料庫的所有集合。

db.colleciton.find()來尋找表格的所有資料。

db.serverStatus()查看資料庫伺服器的狀態。

db.stats()查詢指定資料庫的統計資訊。

use xxx如果資料庫不存在則建立資料庫（必須在雖然插入一條資料）

db.storeCollection.insert({'version':'13', 'segment':'456'})插入資料，同時建立集合

db.dropDatabase()刪除資料庫

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})建立索引，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，刪除所有索引

db.baseSe.reIndex()重建索引

db.baseSe.storageSize()查詢指定資料庫的集合的可用的儲存空間

db.baseSe.totalSize()查詢集合已指派的儲存空間

PS：非正常關閉後無法啟動問題
段時間不小心非正常關閉了mongoDB，準備重啟卻發現不行，錯誤資訊如下：

Tue Apr 17 11:13:30Tue 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 11:13:30Tue Apr 17 11:13:30 [initandlisten] MongoDB starting : pid=7128 port=27017 dbpath=D:\Programs\mongodb204\db 32-bit host=FALCONTue 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 dataTue Apr 17 11:13:30 [initandlisten] **    see http://blog.mongodb.org/post/137788967/32-bit-limitationsTue Apr 17 11:13:30 [initandlisten] **    with --journal, the limit is lowerTue Apr 17 11:13:30 [initandlisten]Tue Apr 17 11:13:30 [initandlisten] db version v2.0.4, pdfile version 4.5Tue Apr 17 11:13:30 [initandlisten] git version: 329f3c47fe8136c03392c8f0e548506cb21f8ebfTue 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_42Tue 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, terminatingTue 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() finishedTue Apr 17 11:13:30 dbexit: really exiting now

解決方案：
1、刪除%MONGO_HOME%/db下的.lock檔案

2、輸入命令 mongod --repair

3、重啟mongoDB