MongoDB常用命令彙總(一)
MongoDB常用命令彙總(一)
---增，刪，改，查
一：增(insert)
二：刪(delete)
三：改(update)
四：查(select)
---連線資料庫
[mongo@cjc bin]$ pwd
/usr/local/mongodb/bin
[mongo@cjc bin]$ ./mongo --port 27017
---建立新資料庫cjcdb和cjctest
MongoDB Enterprise > use cjcdb
---插入資料，才會建立資料庫
MongoDB Enterprise > db.tab01.insert({"time":"2018-11-25 18:20"})
MongoDB Enterprise > use cjctest
MongoDB Enterprise > db.tab01.insert({"time":"2018-11-25 18:21"})
---檢視有哪些資料庫
MongoDB Enterprise > show dbs
...
cjcdb 0.000GB
cjctest 0.000GB
---MongoDB 刪除資料庫cjctest
MongoDB Enterprise > use cjctest
switched to db cjctest
---檢視當前連線的資料庫
MongoDB Enterprise > db
cjctest
---刪除資料庫(謹慎操作)
MongoDB Enterprise > db.dropDatabase()
{ "dropped" : "cjctest", "ok" : 1 }
---MongoDB 建立集合
MongoDB Enterprise > use cjcdb
switched to db cjcdb
MongoDB Enterprise > db.createCollection("tab02")
{ "ok" : 1 }
MongoDB Enterprise > db.createCollection("tab03")
{ "ok" : 1 }
在 MongoDB 中，你不需要建立集合。當你插入一些文件時，MongoDB 會自動建立集合。
MongoDB Enterprise > db.tab05.insert({"id":"123456"})
WriteResult({ "nInserted" : 1 })
MongoDB Enterprise > show collections
tab01
tab02
tab03
tab05
......
================
一：增(insert)
================
插入文件
MongoDB 使用 insert() 或 save() 方法向集合中插入文件：
MongoDB Enterprise > use cjcdb
switched to db cjcdb
MongoDB Enterprise > db
cjcdb
MongoDB Enterprise >
db.tab02.insert({id:1, name:'a'})
db.tab02.insert({id:1, name:'ab'})
db.tab02.insert({id:1, name:'cae'})
db.tab02.insert({id:2, name:'b'})
db.tab02.insert({id:3, name:'c'})
db.tab02.insert({id:4, name:'d'})
db.tab02.insert({id:5, name:'e'})
db.tab02.insert({id:6, name:'f'})
db.tab02.insert({id:7, name:'g'})
db.tab02.insert({id:8, name:'h'})
db.tab02.insert({id:9, name:'i'})
db.tab02.insert({id:10, name:'j'})
db.tab02.insert({id:10, name:'h'})
db.tab02.insert({id:10, name:'i'})
db.tab02.insert({id:10,c100:'h',c200:'f',c300:'業精於勤'})
db.tab02.insert({ccc:10,c10:'h',c20:'f',c30:'行成於思'})
---我們也可以將資料定義為一個變數，如下所示：
MongoDB Enterprise > document=({title: 'blog.itpub',
... description: 'chenoracleblog-chenjuchao',
... by: 'mongo test',
... url: 'http://blog.itpub.net/29785807/'
... })
MongoDB Enterprise > db.tab02.insert(document)
=================
二：刪(delete)
=================
---delete
MongoDB remove()函式是用來移除集合中的資料。
MongoDB資料更新可以使用update()函式。在執行remove()函式前先執行find()命令來判斷執行的條件是否正確，這是一個比較好的習慣
MongoDB Enterprise > db
cjcdb
---刪除tab02表中id=10的資料
MongoDB Enterprise > db.tab02.find({id:10})
{ "_id" : ObjectId("5bfacc790063f23910737472"), "id" : 10, "name" : "j" }
{ "_id" : ObjectId("5bfacc790063f23910737473"), "id" : 10, "name" : "h" }
{ "_id" : ObjectId("5bfacc790063f23910737474"), "id" : 10, "name" : "i" }
{ "_id" : ObjectId("5bfacc790063f23910737475"), "id" : 10, "c100" : "h", "c200" : "f", "c300" : "業精於勤" }
MongoDB Enterprise >
MongoDB Enterprise > db.tab02.remove({id:10})
WriteResult({ "nRemoved" : 4 })
---remove() 方法已經過時了，現在官方推薦使用 deleteOne() 和 deleteMany() 方法。
刪除 id 等於 1 的第一個文件：
MongoDB Enterprise > db.tab02.find({id:1})
{ "_id" : ObjectId("5bfacc790063f23910737467"), "id" : 1, "name" : "a" }
{ "_id" : ObjectId("5bfacc790063f23910737468"), "id" : 1, "name" : "ab" }
{ "_id" : ObjectId("5bfacc790063f23910737469"), "id" : 1, "name" : "cae" }
MongoDB Enterprise > db.tab02.deleteOne({id:1})
{ "acknowledged" : true, "deletedCount" : 1 }
MongoDB Enterprise > db.tab02.find({id:1})
{ "_id" : ObjectId("5bfacc790063f23910737468"), "id" : 1, "name" : "ab" }
{ "_id" : ObjectId("5bfacc790063f23910737469"), "id" : 1, "name" : "cae" }
---刪除 id 等於 1 的全部文件：
MongoDB Enterprise > db.tab02.deleteMany({id:1})
{ "acknowledged" : true, "deletedCount" : 2 }
MongoDB Enterprise > db.tab02.find({id:1})
MongoDB Enterprise >
---如刪除集合下全部文件：
---truncate table ......
MongoDB Enterprise > db.tab02.find()
{ "_id" : ObjectId("5bfacc790063f2391073746a"), "id" : 2, "name" : "b" }
{ "_id" : ObjectId("5bfacc790063f2391073746b"), "id" : 3, "name" : "c" }
{ "_id" : ObjectId("5bfacc790063f2391073746c"), "id" : 4, "name" : "d" }
{ "_id" : ObjectId("5bfacc790063f2391073746d"), "id" : 5, "name" : "e" }
{ "_id" : ObjectId("5bfacc790063f2391073746e"), "id" : 6, "name" : "f" }
{ "_id" : ObjectId("5bfacc790063f2391073746f"), "id" : 7, "name" : "g" }
{ "_id" : ObjectId("5bfacc790063f23910737470"), "id" : 8, "name" : "h" }
{ "_id" : ObjectId("5bfacc790063f23910737471"), "id" : 9, "name" : "i" }
{ "_id" : ObjectId("5bfacc7a0063f23910737476"), "ccc" : 10, "c10" : "h", "c20" : "f", "c30" : "行成於思" }
{ "_id" : ObjectId("5bfaccb10063f23910737477"), "title" : "blog.itpub", "description" : "chenoracleblog", "by" : "mongo test", "url" : "http://blog.itpub.net/29785807/" }
MongoDB Enterprise > db.tab02.deleteMany({})
{ "acknowledged" : true, "deletedCount" : 10 }
MongoDB Enterprise > db.tab02.find()
MongoDB Enterprise >
---刪除集合
---drop table ......
MongoDB Enterprise > show collections
tab01
tab02
tab03
MongoDB Enterprise > db.tab02.drop()
true
MongoDB Enterprise > show collections
tab01
tab03
===============
三：改(update)
===============
---MongoDB 更新文件
MongoDB 使用 update() 和 save() 方法來更新集合中的文件。
MongoDB Enterprise > db.tab05.find({'id':1})
{ "_id" : ObjectId("5bfafab30063f23910737478"), "id" : 1, "name" : "a" }
{ "_id" : ObjectId("5bfafab30063f23910737479"), "id" : 1, "name" : "aa" }
{ "_id" : ObjectId("5bfafab30063f2391073747a"), "id" : 1, "name" : "aaa" }
---更改符合條件的第一條資料
MongoDB Enterprise > db.tab05.update({'id':1},{$set:{name:'chenjuchao'}})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
MongoDB Enterprise > db.tab05.find({'id':1})
{ "_id" : ObjectId("5bfafab30063f23910737478"), "id" : 1, "name" : "chenjuchao" }
{ "_id" : ObjectId("5bfafab30063f23910737479"), "id" : 1, "name" : "aa" }
{ "_id" : ObjectId("5bfafab30063f2391073747a"), "id" : 1, "name" : "aaa" }
---multi:true更改符合條件的所有資料
MongoDB Enterprise > db.tab05.update({'id':1},{$set:{name:'chenjuchao'}},{multi:true})
WriteResult({ "nMatched" : 3, "nUpserted" : 0, "nModified" : 2 })
MongoDB Enterprise > db.tab05.find({'id':1})
{ "_id" : ObjectId("5bfafab30063f23910737478"), "id" : 1, "name" : "chenjuchao" }
{ "_id" : ObjectId("5bfafab30063f23910737479"), "id" : 1, "name" : "chenjuchao" }
{ "_id" : ObjectId("5bfafab30063f2391073747a"), "id" : 1, "name" : "chenjuchao" }
================
四：查(select)
================
1 (!=)不等於 - $ne
2 (in)包含 - $in
3 (not in) - $nin 不包含
4 (>) 大於 - $gt
5 (>=) 大於等於 - $gte
6 (<) 小於 - $lt
7 (<= ) 小於等於 - $lte
8 模糊查詢
9 AND
10 OR
11 Limit
12 Skip
13 Sort
14 count
---插入測試資料
---以易讀的方式來讀取資料，可以使用 pretty() 方法
MongoDB Enterprise>
db.tab01.insert({name:'a',age:'10'})
db.tab01.insert({name:'ab',age:'10'})
db.tab01.insert({name:'bac',age:'10'})
db.tab01.insert({name:'d',age:'12'})
db.tab01.insert({name:'e',age:'13'})
db.tab01.insert({name:'aaa',age:'14'})
db.tab01.insert({name:'f',age:'15'})
db.tab01.insert({name:'g',age:'16'})
db.tab01.insert({name:'a',age:'17'})
db.tab01.insert({name:'a',age:'18'})
db.tab01.insert({name:'a',age:19})
db.tab01.insert({name:'a',age:20})
---檢視全部
MongoDB Enterprise> db.tab01.find()
---加pretty()更易讀
db.tab01.find().pretty()
=====
等於
=====
MongoDB Enterprise> db.tab01.find({age:20})
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
MongoDB Enterprise> db.tab01.find({age:'20'})
MongoDB Enterprise>
MongoDB Enterprise> db.tab01.find({age:'10'})
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a6"), "name" : "ab", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a7"), "name" : "bac", "age" : "10" }
MongoDB Enterprise> db.tab01.find({age:10})
MongoDB Enterprise>
====================
1 (!=)不等於 - $ne
====================
MongoDB Enterprise> db.tab01.find({name:{$ne:'a'}});
{ "_id" : ObjectId("5bfcc7b036850458dff055a6"), "name" : "ab", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a7"), "name" : "bac", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a8"), "name" : "d", "age" : "12" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a9"), "name" : "e", "age" : "13" }
{ "_id" : ObjectId("5bfcc7b036850458dff055aa"), "name" : "aaa", "age" : "14" }
{ "_id" : ObjectId("5bfcc7b036850458dff055ab"), "name" : "f", "age" : "15" }
{ "_id" : ObjectId("5bfcc7b036850458dff055ac"), "name" : "g", "age" : "16" }
{ "_id" : ObjectId("5bfcf37936850458dff055b1"), "name" : "nba", "age" : 21 }
{ "_id" : ObjectId("5bfcf37936850458dff055b2"), "name" : "cba", "age" : 21 }
==================
2 (in)包含 - $in
==================
MongoDB Enterprise> db.tab01.find({name:{$in:['cba','nba']}});
{ "_id" : ObjectId("5bfcf37936850458dff055b1"), "name" : "nba", "age" : 21 }
{ "_id" : ObjectId("5bfcf37936850458dff055b2"), "name" : "cba", "age" : 21 }
=========================
3 (not in) - $nin 不包含
=========================
MongoDB Enterprise> db.tab01.find({age:{$nin:['10','12','13','14','15',21]}});
{ "_id" : ObjectId("5bfcc7b036850458dff055ac"), "name" : "g", "age" : "16" }
{ "_id" : ObjectId("5bfcc7b036850458dff055ad"), "name" : "a", "age" : "17" }
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
{ "_id" : ObjectId("5bfccbc536850458dff055af"), "name" : "a", "age" : 19 }
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
=================
4 (>) 大於 - $gt
=================
MongoDB Enterprise> db.tab01.find({age:{$gt:'17'}})
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
========================
5 (>=) 大於等於 - $gte
========================
MongoDB Enterprise> db.tab01.find({age:{$gte:'17'}})
{ "_id" : ObjectId("5bfcc7b036850458dff055ad"), "name" : "a", "age" : "17" }
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
========================
6 (<) 小於 - $lt
========================
MongoDB Enterprise> db.tab01.find({age:{$lt:'12'}})
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a6"), "name" : "ab", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a7"), "name" : "bac", "age" : "10" }
========================
7 (<= ) 小於等於 - $lte
========================
MongoDB Enterprise> db.tab01.find({age:{$lte:'12'}})
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a6"), "name" : "ab", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a7"), "name" : "bac", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a8"), "name" : "d", "age" : "12" }
============
8 模糊查詢
============
---查詢 name 包含"a"的文件：
MongoDB Enterprise> db.tab01.find({name:/a/})
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a6"), "name" : "ab", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a7"), "name" : "bac", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055aa"), "name" : "aaa", "age" : "14" }
{ "_id" : ObjectId("5bfcc7b036850458dff055ad"), "name" : "a", "age" : "17" }
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
{ "_id" : ObjectId("5bfccbc536850458dff055af"), "name" : "a", "age" : 19 }
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
---查詢 name 欄位以"a"開頭的文件：
MongoDB Enterprise> db.tab01.find({name:/^a/})
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a6"), "name" : "ab", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055aa"), "name" : "aaa", "age" : "14" }
{ "_id" : ObjectId("5bfcc7b036850458dff055ad"), "name" : "a", "age" : "17" }
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
{ "_id" : ObjectId("5bfccbc536850458dff055af"), "name" : "a", "age" : 19 }
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
---查詢 name 欄位以"a"結尾的文件：
---db.tab01.insert({name:'nba',age:21})
---db.tab01.insert({name:'cba',age:21})
MongoDB Enterprise> db.tab01.find({name:/a$/})
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055aa"), "name" : "aaa", "age" : "14" }
{ "_id" : ObjectId("5bfcc7b036850458dff055ad"), "name" : "a", "age" : "17" }
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
{ "_id" : ObjectId("5bfccbc536850458dff055af"), "name" : "a", "age" : 19 }
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
{ "_id" : ObjectId("5bfcf37936850458dff055b1"), "name" : "nba", "age" : 21 }
{ "_id" : ObjectId("5bfcf37936850458dff055b2"), "name" : "cba", "age" : 21 }
=======
9 AND
=======
MongoDB 的 find() 方法可以傳入多個鍵(key)，每個鍵(key)以逗號隔開，即常規 SQL 的 AND 條件。
語法格式如下：
MongoDB Enterprise> db.tab01.find({name:'a', age:20})
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
MongoDB Enterprise> db.tab01.find({name:'a',age:{$gt:18}})
{ "_id" : ObjectId("5bfccbc536850458dff055af"), "name" : "a", "age" : 19 }
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
=======
10 OR
=======
MongoDB OR 條件語句使用了關鍵字 $or：
MongoDB Enterprise> db.tab01.find({$or:[{name:'nba'},{age:'12'}]})
{ "_id" : ObjectId("5bfcc7b036850458dff055a8"), "name" : "d", "age" : "12" }
{ "_id" : ObjectId("5bfcf37936850458dff055b1"), "name" : "nba", "age" : 21 }
---AND 和 OR 聯合使用
MongoDB Enterprise> db.tab01.find({name:'a',$or:[{age:'18'},{age:20}]})
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
==========
11 Limit
==========
MongoDB Limit() 方法
如果你需要在MongoDB中讀取指定數量的資料記錄，可以使用MongoDB的Limit方法，limit()方法接受一個數字引數，該引數指定從MongoDB中讀取的記錄條數。
limit()方法基本語法如下所示：
MongoDB Enterprise> db.tab01.find({age:'10'}).limit(1)
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
MongoDB Enterprise> db.tab01.find().limit(2)
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a6"), "name" : "ab", "age" : "10" }
=========
12 Skip
=========
MongoDB Skip() 方法
我們除了可以使用limit()方法來讀取指定數量的資料外，還可以使用skip()方法來跳過指定數量的資料，skip方法同樣接受一個數字引數作為跳過的記錄條數。
注:skip()方法預設引數為 0 。
skip() 方法指令碼語法格式如下：
>db.COLLECTION_NAME.find().limit(NUMBER).skip(NUMBER)
例項
以下例項只會顯示第二條文件資料
MongoDB Enterprise> db.tab01.find({age:'10'}).limit(1).skip(2)
{ "_id" : ObjectId("5bfcc7b036850458dff055a7"), "name" : "bac", "age" : "10" }
=======================
13 MongoDB 排序 Sort
=======================
skip(), limilt(), sort()三個放在一起執行的時候，執行的順序是先 sort(), 然後是 skip()，最後是顯示的 limit()。
MongoDB sort() 方法
在 MongoDB 中使用 sort() 方法對資料進行排序，sort() 方法可以通過引數指定排序的欄位，並使用 1 和 -1 來指定排序的方式，其中 1 為升序排列，而 -1 是用於降序排列。
語法
sort()方法基本語法如下所示：
>db.COLLECTION_NAME.find().sort({KEY:1})
例項
---升序
MongoDB Enterprise> db.tab01.find().sort({age:1})
{ "_id" : ObjectId("5bfccbc536850458dff055af"), "name" : "a", "age" : 19 }
{ "_id" : ObjectId("5bfccbc636850458dff055b0"), "name" : "a", "age" : 20 }
{ "_id" : ObjectId("5bfcf37936850458dff055b1"), "name" : "nba", "age" : 21 }
{ "_id" : ObjectId("5bfcf37936850458dff055b2"), "name" : "cba", "age" : 21 }
{ "_id" : ObjectId("5bfcc7b036850458dff055a5"), "name" : "a", "age" : "10" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a8"), "name" : "d", "age" : "12" }
{ "_id" : ObjectId("5bfcc7b036850458dff055a9"), "name" : "e", "age" : "13" }
{ "_id" : ObjectId("5bfcc7b036850458dff055aa"), "name" : "aaa", "age" : "14" }
......
---降序
MongoDB Enterprise> db.tab01.find().sort({age:-1})
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
{ "_id" : ObjectId("5bfcc7b036850458dff055ad"), "name" : "a", "age" : "17" }
{ "_id" : ObjectId("5bfcc7b036850458dff055ac"), "name" : "g", "age" : "16" }
......
---取age最大值
MongoDB Enterprise> db.tab01.find().sort({age:-1}).limit(1)
{ "_id" : ObjectId("5bfcc7b136850458dff055ae"), "name" : "a", "age" : "18" }
---取age最二大值
MongoDB Enterprise> db.tab01.find().sort({age:-1}).limit(1).skip(1)
{ "_id" : ObjectId("5bfcc7b036850458dff055ad"), "name" : "a", "age" : "17" }
---取age最三大值
MongoDB Enterprise> db.tab01.find().sort({age:-1}).limit(1).skip(2)
{ "_id" : ObjectId("5bfcc7b036850458dff055ac"), "name" : "g", "age" : "16" }
======================
14 count查詢記錄條數
======================
使用count()方法查詢表中的記錄條數，例如，下面的命令查詢表users的記錄數量：
MongoDB Enterprise> db.tab01.find().count();
14
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/29785807/viewspace-2221865/，如需轉載，請註明出處，否則將追究法律責任。
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