// 登錄
D:\mongodb>D:\mongodb\mongodb206\mongodb206\bin\mongo 127.0.0.1:27017/admin
MongoDB shell version: 2.0.6
connecting to: 127.0.0.1:27017/admin
//在緩存中創建一個數據庫 
> use foobar
switched to db foobar
> db.persons.insert(name:"tomcat")
//插入數據後數據庫會真正創建
Sat Jun 03 15:22:26 SyntaxError: missing ) after argument list (shell):1
 

> db.persons.insert((name:"tomcat"))
Sat Jun 03 15:22:41 SyntaxError: missing ) in parenthetical (shell):1
> db.persons.insert({name:"tomcat"})
> show dbs;
//顯示所有的數據
foobar  0.03125GB
local   (empty)//默認建立的
> show collections //顯示數據庫下面的表
persons
system.indexes
> db.system.indexes.fin()
Sat Jun 
 
03 15:24:23 TypeError: db.system.indexes.fin is not a function (shell):1

> db.system.indexes.find(); //查詢語句
{ "v" : 1, "key" : { "_id" : 1 }, "ns" : "foobar.persons", "name" : "_id_" }
> db.foobar.find();
> db.person.find();
> db.persons.find();//查詢所有
{ "_id" : ObjectId("593263d9622897d4e7c9b220
 
"), "name" : "tomcat" }
> db.persons.findone(); //查詢第一條
Sat Jun 03 15:27:20 TypeError: db.persons.findone is not a function (shell):1
> db.persons.insert({name:"extjs"})//新增數據
> db.persons.find();
{ "_id" : ObjectId("593263d9622897d4e7c9b220"), "name" : "tomcat" }
{ "_id" : ObjectId("593264f2622897d4e7c9b221"), "name" : "extjs" }
//更新數據，第一個參數是選擇器，第二個是要更新的數據
> db.persons.update({name:"extjs"},{$set:{name:"extjs4.0"}});

> db.persons.find();
{ "_id" : ObjectId("593263d9622897d4e7c9b220"), "name" : "tomcat" }
{ "_id" : ObjectId("593264f2622897d4e7c9b221"), "name" : "extjs4.0" }
> var p  = db.persons.findOne(); //定義變量
> p //查看
{ "_id" : ObjectId("593263d9622897d4e7c9b220"), "name" : "tomcat" }
> db.persons.update(p,{$set:{name:"tomcat8"}});
> db.persons.find(); //查找
{ "_id" : ObjectId("593263d9622897d4e7c9b220"), "name" : "tomcat8" }
{ "_id" : ObjectId("593264f2622897d4e7c9b221"), "name" : "extjs4.0" }
> p
{ "_id" : ObjectId("593263d9622897d4e7c9b220"), "name" : "tomcat" }
> var p  = db.persons.findOne();
> db.persons.update(p,{$set:{name:"tomcat8",age=1}});
Sat Jun 03 15:40:08 SyntaxError: missing : after property id (shell):1
> db.persons.update(p,{$set:{name:"tomcat8",age="1"}});
Sat Jun 03 15:40:22 SyntaxError: missing : after property id (shell):1
> db.persons.update(p,{$set:{name:"tomcat8",age:"1"}});
//刪除操作表
> db.persons.remove({age:"1"})
> db.persons.find()
{ "_id" : ObjectId("593264f2622897d4e7c9b221"), "name" : "extjs4.0" }
> show collections
persons
system.indexes
//刪除當前數據庫
> db.dropDatabases()
Sat Jun 03 15:47:16 TypeError: db.dropDatabases is not a function (shell):1
> show dbs //顯示所有的數據庫
foobar  0.03125GB
local   (empty)
> db.dropDatabase()
{ "dropped" : "foobar", "ok" : 1 }
> show  dbs;
local   (empty)
> use foobar
switched to db foobar
> db.persons.insert({age:1,name:"tom",gender:"1"})
> db.persons.find();
{ "_id" : ObjectId("593269f2622897d4e7c9b222"), "age" : 1, "name" : "tom", "gend
er" : "1" }
> show dbs;
foobar  0.03125GB
local   (empty)
> show collections;
persons
system.indexes
> db.help() //幫助
DB methods:
        db.addUser(username, password[, readOnly=false])
        db.auth(username, password)
        db.cloneDatabase(fromhost)
        db.commandHelp(name) returns the help for the command
        db.copyDatabase(fromdb, todb, fromhost)
        db.createCollection(name, { size : ..., capped : ..., max : ... } )
        db.currentOp() displays the current operation in the db
        db.dropDatabase()
        db.eval(func, args) run code server-side
        db.getCollection(cname) same as db[‘cname‘] or db.cname
        db.getCollectionNames()
        db.getLastError() - just returns the err msg string
        db.getLastErrorObj() - return full status object
        db.getMongo() get the server connection object
        db.getMongo().setSlaveOk() allow this connection to read from the nonmas
ter member of a replica pair
        db.getName()
        db.getPrevError()
        db.getProfilingLevel() - deprecated
        db.getProfilingStatus() - returns if profiling is on and slow threshold

        db.getReplicationInfo()
        db.getSiblingDB(name) get the db at the same server as this one
        db.isMaster() check replica primary status
        db.killOp(opid) kills the current operation in the db
        db.listCommands() lists all the db commands
        db.logout()
        db.printCollectionStats()
        db.printReplicationInfo()
        db.printSlaveReplicationInfo()
        db.printShardingStatus()
        db.removeUser(username)
        db.repairDatabase()
        db.resetError()
        db.runCommand(cmdObj) run a database command.  if cmdObj is a string, tu
rns 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() allow queries on a replication slave server
        db.fsyncLock() flush data to disk and lock server for backups
        db.fsyncUnock() unlocks server following a db.fsyncLock()
> db.dbgetName()
Sat Jun 03 16:03:03 TypeError: db.dbgetName is not a function (shell):1
> db.dbgetName()
Sat Jun 03 16:03:11 TypeError: db.dbgetName is not a function (shell):1
> db.getName()//獲取當前是數據庫名字
foobar
> db.getstatus
foobar.getstatus
> db.status()
Sat Jun 03 16:03:39 TypeError: db.status is not a function (shell):1
> db.stats()  //獲取當前數據庫的信息
{
        "db" : "foobar",
        "collections" : 3,
        "objects" : 5,
        "avgObjSize" : 48.8,
        "dataSize" : 244,
        "storageSize" : 12288,
        "numExtents" : 3,
        "indexes" : 1,
        "indexSize" : 8176,
        "fileSize" : 16777216,
        "nsSizeMB" : 16,
        "ok" : 1
}
> db.persons.count() 
1
> db.person.help();//幫助
DBCollection help
        db.person.find().help() - show DBCursor help
        db.person.count()
        db.person.dataSize()
        db.person.distinct( key ) - eg. db.person.distinct( ‘x‘ )
        db.person.drop() drop the collection
        db.person.dropIndex(name)
        db.person.dropIndexes()
        db.person.ensureIndex(keypattern[,options]) - options is an object with
these possible fields: name, unique, dropDups
        db.person.reIndex()
        db.person.find([query],[fields]) - query is an optional query filter. fi
elds is optional set of fields to return.
                                                      e.g. db.person.find( {x:77
} , {name:1, x:1} )
        db.person.find(...).count()
        db.person.find(...).limit(n)
        db.person.find(...).skip(n)
        db.person.find(...).sort(...)
        db.person.findOne([query])
        db.person.findAndModify( { update : ... , remove : bool [, query: {}, so
rt: {}, ‘new‘: false] } )
        db.person.getDB() get DB object associated with collection
        db.person.getIndexes()
        db.person.group( { key : ..., initial: ..., reduce : ...[, cond: ...] }
)
        db.person.mapReduce( mapFunction , reduceFunction , <optional params> )
        db.person.remove(query)
        db.person.renameCollection( newName , <dropTarget> ) renames the collect
ion.
        db.person.runCommand( name , <options> ) runs a db command with the give
n name where the first param is the collection name
        db.person.save(obj)
        db.person.stats()
        db.person.storageSize() - includes free space allocated to this collecti
on
        db.person.totalIndexSize() - size in bytes of all the indexes
        db.person.totalSize() - storage allocated for all data and indexes
        db.person.update(query, object[, upsert_bool, multi_bool])
        db.person.validate( <full> ) - SLOW
        db.person.getShardVersion() - only for use with sharding
        db.person.getShardDistribution() - prints statistics about data distribu
tion in the cluster
定義一個函數，函數的功能是插入數據
> function insert3(o){ db.getCollection("persons").insert(o);
... }
> insert3({name:"kitty"})
> db.persons.find();
{ "_id" : ObjectId("593269f2622897d4e7c9b222"), "age" : 1, "name" : "tom", "gend
er" : "1" }
{ "_id" : ObjectId("5932733d622897d4e7c9b227"), "name" : "kitty" }
>
//將參數中的字符串當做js代碼處理

> db.eval(‘return "hello mongodb "‘);
hello mongodb

> for (var i = 0; i<10 ;i++){ db.persons.insert({name:i})
... }
> db.persons.find()
{ "_id" : ObjectId("593269f2622897d4e7c9b222"), "age" : 1, "name" : "tom", "gend
er" : "1" }
{ "_id" : ObjectId("5932733d622897d4e7c9b227"), "name" : "kitty" }
{ "_id" : "0001", "name" : "yarn" }
{ "_id" : ObjectId("59327d6e622897d4e7c9b228"), "name" : 0 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b229"), "name" : 1 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b22a"), "name" : 2 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b22b"), "name" : 3 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b22c"), "name" : 4 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b22d"), "name" : 5 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b22e"), "name" : 6 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b22f"), "name" : 7 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b230"), "name" : 8 }
{ "_id" : ObjectId("59327d6e622897d4e7c9b231"), "name" : 9 }

save和insert的區別，save會變成更新語句並保存，insert則會報錯

刪除所有，但是索引不會刪除
> db.persons.remove()
> db.persons.find()

> db.persons.update({_id:"02"}, {_id:"02",name:"x0023"},true);//insert or update
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x0023" }
{ "_id" : "03", "name" : "x03" }

批量新增 在shell中是通過循環實現的，

更新時，只會更新滿足條件的第一條數據

批量更新

> db.persons.update({name:"x03"}, {$set:{name:"x03sd"}},false,true);//批量更新
> db.persons.find()
{ "_id" : "01", "name" : "01" }
{ "_id" : "02", "name" : "x03sd" }
{ "_id" : "03", "name" : "x03sd" }
>

mongodb 入門