脚本宝典收集整理的这篇文章主要介绍了MongoDB最基本命令速查笔记,脚本宝典觉得挺不错的,现在分享给大家,也给大家做个参考。
安装后在控制台输入:
mongo启动客户端。
show dbs显示所有数据库。
use xxx选中数据库为当前使用的数据库。
show collections显示当前数据库的所有集合。
db.collecITon.find()来查找表格的所有数据。
db.stats()查询指定数据库的统计信息。
use xxx如果数据库不存在则创建数据库(必须在虽然插入一条数据)
db.StoreCollection.insert({'version':'13', 'segment':'456'})插入数据,同时创建集合
db.dropDatabase()删除数据库
db.mycoll.drop()删除集合
db.storeCollection.save({'version':'3.5', 'segment':'e3ol6'})更新记录
db.storeCollection.remove({'version':'3.5'}) 删除记录
db.page.ensureindex({'title':1, 'url':-1})创建索引,1正序,-1逆序
db.page.getIndexes()查询建立的索引
db.mycoll.dropIndex(name) 删除索引,如果不带参数,删除所有索引
db.baseSe.reIndex()重建索引
db.baseSe.storageSize()查询指定数据库的集合的可用的存储空间
db.baseSe.totalSize()查询集合已分配的存储空间
PS:非正常关闭后无法启动问题
段时间不小心非正常关闭了mongoDB,准备重启却发现不行,错误信息如下:
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
解决方法:
1、删除%MONGO_HOME%/db下的.lock文件
2、输入命令 mongod --repair
3、重启mongoDB
以上是脚本宝典为你收集整理的MongoDB最基本命令速查笔记全部内容,希望文章能够帮你解决MongoDB最基本命令速查笔记所遇到的问题。
本图文内容来源于网友网络收集整理提供,作为学习参考使用,版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ:384754419,请注明来意。